Developing Applications and Automating Workflows using Cisco Platforms (DEVASC) practice questions

1. Question 1 of 25

   Which platform has an API that can be used to obtain a list of vulnerable software on user devices?

   • ACisco Umbrella
   • BCisco Firepower
   • CCisco Identity Services Engine
   • DCisco Advanced Malware Protection

   Show answer

   Correct answer: D

   How others answered

   • D100%

   Explanation

   AMP for Endpoints identifies vulnerable software across your environment to help reduce the attack surface. Endpoints running vulnerable software are listed out and are given priority based on industry CVE (Common Vulnerabilities and Exposures) scoring

   Adapted from community discussion by Mormon · 2022-06-24 · 11 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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   • cisco.com documentation
   • cisco.com documentation

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   Question 1 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. M

      Mormon

      2022-06-24

      11 upvotes

      AMP for Endpoints identifies vulnerable software across your environment to help reduce the attack surface. Endpoints running vulnerable software are listed out and are given priority based on industry CVE (Common Vulnerabilities and Exposures) scoring

   2. J

      jonasff

      2022-06-26

      9 upvotes

      Found API on AMP that shows vulnerabilities: https://api-docs.amp.cisco.com/api_actions/details?api_action=GET+%2Fv1%2Fvulnerabilities&api_host=api.amp.cisco.com&api_resource=Vulnerabilities&api_version=v1

   3. M

      Miguex125

      2022-07-18

      4 upvotes

      Yes, must be D accorinding wtih this information from GET /v1/computers/{:connector_guid}/vulnerabilities Description Provides a list of vulnerabilities observed on a specific computer. https://api-docs.amp.cisco.com/api_actions/details?api_action=GET+%2Fv1%2Fcomputers%2F%7B%3Aconnector_guid%7D%2Fvulnerabilities&api_host=api.amp.cisco.com&api_resource=Computer&api_version=v1

2. Question 2 of 25

   While developing a real-time VoIP application on a Cisco Webex platform, users report that their voice gets chopped or parts of the conversation drop out. Which network constraint is impacting the application?

   • Ajitter
   • Bcapacity
   • Cdelay
   • Dlatency

   Show answer

   Correct answer: A

   How others answered

   • A57%
   • B43%

   Only 57% agreed on this answer — treat it as contested rather than settled.

   Explanation

   Simple delay and latency in the context both are the same. Jitter is correct, if the jitter is higher , more posiblitily get lost packets

   Adapted from community discussion by aplicacion101 · 2022-09-10 · 2 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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   • Cisco documentation

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   Question 2 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. W

      Woonesuf

      2023-02-20

      1 upvote

      Jitter can cause audio drop-outs if the delay is high enough that the receiver considers the packets missing. Jitter buffers can help with this, but does not solve cases of very high jitter which can be caused by capacity issues. "If the jitter is so large that it causes packets to be received out of the range of this buffer, the out-of-range packets are discarded and dropouts are heard in the audio. For losses as small as one packet, the DSP interpolates what it thinks the audio should be and no problem is audible. When jitter exceeds what the DSP can do to make up for the missing packets, audio problems are heard." Source: https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/18902-jitter-packet-voice.html

   2. A

      aplicacion101

      2022-09-10

      2 upvotes

      Simple delay and latency in the context both are the same. Jitter is correct, if the jitter is higher , more posiblitily get lost packets

   3. R

      rtg2123

      2023-03-11

      1 upvote

      Yes. "The main effects of jitter on VoIP calls include dropped calls, missing words, and service disruptions." https://www.liveagent.com/customer-support-glossary/jitter-voip/

   4. N

      nunyabeez

      2023-02-09

      1 upvote

      Capacity problems can also cause jitter due to queueing, but again... jitter shouldn't cause full drop-outs. That would typically be caused by dropped packets.

3. Question 3 of 25

   When a Cisco IOS XE networking device is configured using RESTCONF, what is the default data-encoding method?

   • AJSON
   • BYAML
   • CXML
   • Dx-form-encoding

   Show answer

   Correct answer: C

   How others answered

   • C75%
   • A25%

   Explanation

   They are correct, I just tried it against an IOS-EX device and XML was default: SHOW VERSION OUTPUT (cut down): CiscoCSR1000v16.12.1a-1#show ver Cisco IOS XE Software, Version 16.12.01a Cisco IOS Software [Gibraltar], Virtual XE Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version 16.12.1a, RELEASE SOFTWARE (fc2) DEFAULT CURL OUTPUT: curl -k https://192.168.2.48/restconf/ -u "admin:admin" 2016-06-21 CURL OUTPUT WHEN ACCEPT = JSON: curl -k https://192.168.2.48/restconf/ -u "admin:admin" -H "Accept: application/yang-data+json" {"ietf-restconf:restconf":{"data":{},"operations":{},"yang-library-version":"2016-06-21"}}

   Adapted from community discussion by ThePokemonNuzlockingMaster · 2022-05-13 · 5 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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   • Cisco documentation
   • Cisco documentation
   • Cisco documentation

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   Question 3 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. T

      ThePokemonNuzlockingMaster

      2022-05-13

      5 upvotes

      They are correct, I just tried it against an IOS-EX device and XML was default: SHOW VERSION OUTPUT (cut down): CiscoCSR1000v16.12.1a-1#show ver Cisco IOS XE Software, Version 16.12.01a Cisco IOS Software [Gibraltar], Virtual XE Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version 16.12.1a, RELEASE SOFTWARE (fc2) DEFAULT CURL OUTPUT: curl -k https://192.168.2.48/restconf/ -u "admin:admin" 2016-06-21 CURL OUTPUT WHEN ACCEPT = JSON: curl -k https://192.168.2.48/restconf/ -u "admin:admin" -H "Accept: application/yang-data+json" {"ietf-restconf:restconf":{"data":{},"operations":{},"yang-library-version":"2016-06-21"}}

   2. N

      nunyabeez

      2023-02-09

      Selected C4 upvotes

      Yep. It's C. I just ran a simple cURL query on an IOS-XE device without any Accept headers and it returned XML. I had to add the Accept: application/yang-data+json header to get JSON.

   3. H

      hottopic

      2021-09-10

      4 upvotes

      nothing states the default. The links below don't even state a default, just says XML or JSON. Another poor question for a poorly thought out exam.

   4. M

      macxsz

      2022-09-16

      Selected C3 upvotes

      I just tested in the lab. If there is no Accept header, the output is in XML

4. Question 4 of 25

   Which model-driven programmability protocol does Cisco IOS XE Software support?

   • AgNMI
   • BSOAP
   • CSSH
   • DCORBA

   Show answer

   Correct answer: A

   How others answered

   • A100%

   Explanation

   Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/1610/b_1610_programmability_cg/gnmi_protocol.html

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   • cisco.com documentation
   • Cisco documentation

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   Question 4 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. D

      designated

      2024-08-15

      Selected A1 upvote

      The correct answer is A. Cisco IOS XE Software uses gNMI Protocol as a model-driven configuration. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/1610/b_1610_programmability_cg/gnmi_protocol.html

   2. S

      sds85

      2024-09-10

      1 upvote

      Is this question old? Check out https://developer.cisco.com/docs/ios-xe/#!model-based-management-introduction/model-based-management-introduction

5. Question 5 of 25

   What is a requirement when authenticating a RESTCONF API session with a router that runs Cisco IOS XE Software?

   • ANo authentication is required.
   • BOAuth must be used.
   • CA token must be retrieved and the associated string must be embedded in the X-Auth-Token header.
   • DBasic authentication must be used.

   Show answer

   Correct answer: D

   How others answered

   • D100%

   Explanation

   D. From the book: "Authentication is accomplished using typical HTTP authentication models, such as basic authentication, where usernames and passwords are Base64 encoded and transmitted from the client to the server via an Authentication header"

   Adapted from community discussion by macxsz · 2022-11-29 · 3 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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   • Cisco documentation

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   Question 5 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. M

      macxsz

      2022-11-29

      Selected D3 upvotes

      D. From the book: "Authentication is accomplished using typical HTTP authentication models, such as basic authentication, where usernames and passwords are Base64 encoded and transmitted from the client to the server via an Authentication header"

   2. K

      kymoni

      2024-10-05

      Selected D1 upvote

      D is correct - first there's basic authentication, then a token is used for follow-up interaction. https://www.cisco.com/c/en/us/td/docs/routers/csr1000/software/restapi/restapi/RESTAPIclient.html

   3. K

      kymoni

      2024-10-11

      1 upvote

      The question mentions "a requirement when authenticating restconf api SESSION", so for establishing the session, basic authentication is used. D is correct

   4. C

      chalosca

      2024-02-01

      1 upvote

      C is the correct response. A post needs to be done to get the token, then it's added in the header To get this token, we need to send the basic auth.

6. Question 6 of 25

   Which tool is used to block all traffic to the domain by using a single API call?

   • ACisco Firepower
   • BCisco AMP
   • CCisco Umbrella
   • DCisco ISE

   Show answer

   Correct answer: C

   How others answered

   • C100%

   Explanation

   Cisco Umbrella is a Domain Name System (DNS)-based security mechanism that can provide common security for both on-premises and off-premises to provide endpoint security. Cisco Umbrella on-premises deployments do not require an agent to be installed on the endpoint. The firewall is good for blocking inbound threats, but consider threats that originate inside the network. These threats cannot be stopped by perimeter security because they are already behind the firewall. Cisco Umbrella can block client connections at the application layer, regardless of network connection or perimeter security, by preventing the client from resolving DNS for the remote destination. If the client cannot resolve DNS for the remote destination, it cannot establish a connection and download the malware. Cisco Umbrella can be used to prevent connections to malicious websites or to websites that violate corporate security policy.

   Adapted from community discussion by Frank338 · 2024-08-01 · 12 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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   • cisco.com documentation

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   Question 6 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. F

      Frank338

      2024-08-01

      12 upvotes

      Cisco Umbrella is a Domain Name System (DNS)-based security mechanism that can provide common security for both on-premises and off-premises to provide endpoint security. Cisco Umbrella on-premises deployments do not require an agent to be installed on the endpoint. The firewall is good for blocking inbound threats, but consider threats that originate inside the network. These threats cannot be stopped by perimeter security because they are already behind the firewall. Cisco Umbrella can block client connections at the application layer, regardless of network connection or perimeter security, by preventing the client from resolving DNS for the remote destination. If the client cannot resolve DNS for the remote destination, it cannot establish a connection and download the malware. Cisco Umbrella can be used to prevent connections to malicious websites or to websites that violate corporate security policy.

   2. A

      anonymous1966

      2024-10-23

      Selected C1 upvote

      KeyWord = domain Umbrella blocks access to malicious domains, URLs, IPs, and files. The system looks at the nature of any DNS requests and takes an action based on its threat intelligence, which is a large-scale repository of historical data about threats. In turn, Umbrella is building models that classify requests so that you build on its threat intelligence. These requests can be safe and allowed, malicious and blocked, or deemed "risky" and sent to a proxy for deeper inspection.

   3. S

      sds85

      2024-09-10

      Selected C2 upvotes

      Umbrella works with URLs and Firepower with ACLs. https://developer.cisco.com/docs/cloud-security/#!enforcement-introduction-overview/overview

   4. A

      anagy11

      2024-09-20

      Selected C1 upvote

      I think it should be C - Umbrella but I think Firepower can also do that sort of deny action

7. Question 7 of 25

   

   Refer to the exhibit. A developer creates a script to obtain a list of devices by using the Cisco DNA Center API. The remote server authorizes the request only if an authentication token is supplied in the headers. A function named get_auth_token() must retrieve a valid token by using HTTP Basic Authentication. Which code must be added to complete the get_auth_token() function?

   • Aresp = requests.post(url, auth=HTTPBasicAuth(DNAC_USER, DNAC_PASSWORD)) token = resp.json()['Token'] return token
   • Bresp = requests.post(url, auth=(DNAC_USER, DNAC_PASSWORD)) token = resp.json ()['Token'] return token
   • Cresp = http.post(url, auth=HTTPBasicAuth(DNAC_USER, DNAC_PASSWORD)) token = resp.json()['Token'] return token
   • Dresp = http.post(url, auth=(DNAC_USER, DNAC_PASSWORD)) token = resp.json()['Token'] return token

   Show answer

   Correct answer: A

   How others answered

   • A100%

   Explanation

   I think this might be another trick question. The requests module allows a shorthand for basic auth that would normally render answer B to also be correct. If you don't specify HTTPBasicAuth, then the auth parameter automatically assumes it. However, there appears to be a typo in answer B where there's a space between json and (), which would cause an error.

   Adapted from community discussion by nunyabeez · 2024-08-09 · 2 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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   • cisco.com documentation

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   Question 7 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. N

      nunyabeez

      2024-08-09

      Selected A2 upvotes

      I think this might be another trick question. The requests module allows a shorthand for basic auth that would normally render answer B to also be correct. If you don't specify HTTPBasicAuth, then the auth parameter automatically assumes it. However, there appears to be a typo in answer B where there's a space between json and (), which would cause an error.

   2. M

      macxsz

      2023-12-16

      Selected A2 upvotes

      Shoul be A resp = requests.post(url, auth=HTTPBasicAuth(DNAC_USER, DNAC_PASSWORD)) token = resp.json()['Token'] return token

   3. N

      nunyabeez

      2024-08-09

      2 upvotes

      See this link to confirm the shorthand for basic auth with the requests module. https://requests.readthedocs.io/en/latest/user/authentication/

   4. N

      nospampls

      2024-05-28

      Selected A1 upvote

      A because of requests and of auth=HTTPBasciAuth https://developer.cisco.com/docs/dna-center/#!api-quick-start/authentication

8. Question 8 of 25

   

   Refer to the exhibit. A network engineer wants to use an API to update information about device interfaces. The network devices are deployed in a Cisco DevNet Sandbox and have running interfaces. Which line of code needs to be placed in the snippet where the code is missing?

   • A{'Content-Type': 'application/yang.data+xml', 'Accept': 'application/yang.data+xml'}
   • B{'Content-Type': 'application/yang.data+yaml', 'Accept': 'application/yang.data+yaml'}
   • C{'Content-Type': 'application/restconf.data+json', 'Accept': 'application/restconf.data+json'}
   • D{'Content-Type': 'application/yang.data+utf8', 'Accept': 'application/restconf.data+utf8'}

   Show answer

   Correct answer: A

   How others answered

   • A100%

   Explanation

   should be A, as in learning LABs from CISCO https://developer.cisco.com/learning/labs/intro-restconf/ RESTCONF Headers and MIME Types One of the major advantages RESTCONF has over NETCONF is its ability to use JSON as a data format. Many developers prefer JSON (over XML) because of its readability and lower overhead. When crafting a RESTCONF request, you specify the data format being sent and requested by the agent. This is done in a typical HTTP way; using request headers: Content-Type: Specify the type of data being sent from the client Accept: Specify the type of data being requested by the client RESTCONF describes the following MIME types to be used in these headers to indicate the format being requested. application/yang-data+json application/yang-data+xml

   Adapted from community discussion by brunorpacheco · 2024-07-22 · 2 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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   • cisco.com documentation

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   Question 8 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. J

      joephx08

      2023-10-29

      8 upvotes

      I think it is A https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2019/pdf/5eU6DfQV/LTRCTR-2700.pdf

   2. B

      brunorpacheco

      2024-07-22

      Selected A2 upvotes

      should be A, as in learning LABs from CISCO https://developer.cisco.com/learning/labs/intro-restconf/ RESTCONF Headers and MIME Types One of the major advantages RESTCONF has over NETCONF is its ability to use JSON as a data format. Many developers prefer JSON (over XML) because of its readability and lower overhead. When crafting a RESTCONF request, you specify the data format being sent and requested by the agent. This is done in a typical HTTP way; using request headers: Content-Type: Specify the type of data being sent from the client Accept: Specify the type of data being requested by the client RESTCONF describes the following MIME types to be used in these headers to indicate the format being requested. application/yang-data+json application/yang-data+xml

   3. T

      ThePokemonNuzlockingMaster

      2023-11-13

      Selected A4 upvotes

      It's definitely A. RESTCONF supports JSON and XML, but option C says "restconf.data-json", which is incorrect syntax as "restconf" isn't a data type.

   4. M

      mellohello

      2024-06-25

      Selected A1 upvote

      The correct MIME type for data transmitted using the RESTCONF protocol is application/yang.data+json, which indicates that the data is in JSON format and follows the YANG data model. Alternatively, if the data is transmitted in XML format, the MIME type would be application/yang.data+xml. Therefore, the correct line of code to place in the snippet where it is missing would be either {'Content-Type': 'application/yang.data+json', 'Accept': 'application/yang.data+json'} or {'Content-Type': 'application/yang.data+xml', 'Accept': 'application/yang.data+xml'}, depending on the format of the data being transmitted.

9. Question 9 of 25

   An engineer needs to retrieve a list of locally available Firepower Threat Defense upgrade packages by using the Firepower Management Center REST API. The engineer uses a GET request with the URL: /api/fmc_platform/v1/updates/upgradepackages/f413afeb-e6f6-75f4-9169-6d9bd49s625e What does `f413afeb-e6f6-75f4-9169-6d9bd49s625e` represent?

   • Acontainer UUID
   • Bpackage UUID
   • Cdomain UUID
   • Dobject UUID

   Show answer

   Correct answer: B

   How others answered

   • B83%
   • C17%

   Explanation

   Answer: B "GET upgradepackages Request Type: GET Description: Retrieves a list of locally available Firepower Threat Defense upgrade packages, including major upgrades, maintenances release upgrades, and hotfixes. URL: /api/fmc_platform/v1/updates/upgradepackages URL for GET by ID: /api/fmc_platform/v1/updates/upgradepackages/{package_UUID}" Source: https://www.cisco.com/c/en/us/td/docs/security/firepower/640/api/REST/Firepower_Management_Center_REST_API_Quick_Start_Guide_640/Objects_In_The_REST_API.html

   Adapted from community discussion by bea89 · 2024-06-21 · 10 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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   • Cisco documentation
   • Cisco documentation

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   Question 9 discussion

   These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

   1. B

      bea89

      2024-06-21

      10 upvotes

      Answer: B "GET upgradepackages Request Type: GET Description: Retrieves a list of locally available Firepower Threat Defense upgrade packages, including major upgrades, maintenances release upgrades, and hotfixes. URL: /api/fmc_platform/v1/updates/upgradepackages URL for GET by ID: /api/fmc_platform/v1/updates/upgradepackages/{package_UUID}" Source: https://www.cisco.com/c/en/us/td/docs/security/firepower/640/api/REST/Firepower_Management_Center_REST_API_Quick_Start_Guide_640/Objects_In_The_REST_API.html

   2. A

      Angryeyebrows

      2024-07-25

      Selected B3 upvotes

      The answer is B. https://www.cisco.com/c/en/us/td/docs/security/firepower/640/api/REST/Firepower_Management_Center_REST_API_Quick_Start_Guide_640/Firepower_Management_Center_REST_API_Quick_Start_Guide_640_chapter_011.html?bookSearch=true

10. Question 10 of 25

    Select 2

    What are two characteristics of Bare Metal environments that are related to application deployment? (Choose two.)

    • Aspecifically designed for container-based workloads
    • Bsuitable for legacy applications that do not support virtualization
    • Cprovides workloads with access to hardware features
    • Dnot compatible with other cloud services such as PaaS or SaaS offerings
    • Eprovides the hypervisor to host virtual servers

    Show answer

    Correct answer: B, C

    How others answered

    • BC100%

    Explanation

    C and E are correct: look at "Networking Essentials" course on Cisco Netacad. There are two different Hypervisors approach: "Bare metal" and "Hosted". In the “bare metal” approach the hypervisor is installed directly on the hardware; then, instances of an OS are installed on the hypervisor (E). In this approach hypervisors have direct access to the hardware resources (C). In the "hosted" approach the hypervisor is installed on top of the existing OS; then, one or more additional OS instances are installed on top of the hypervisor.

    Adapted from community discussion by Chris_21 · 2022-03-19 · 10 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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    • cisco.com documentation
    • AWS documentation

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    Question 10 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. C

       Chris_21

       2022-03-19

       10 upvotes

       C and E are correct: look at "Networking Essentials" course on Cisco Netacad. There are two different Hypervisors approach: "Bare metal" and "Hosted". In the “bare metal” approach the hypervisor is installed directly on the hardware; then, instances of an OS are installed on the hypervisor (E). In this approach hypervisors have direct access to the hardware resources (C). In the "hosted" approach the hypervisor is installed on top of the existing OS; then, one or more additional OS instances are installed on top of the hypervisor.

    2. I

       Iamrandom

       2022-12-07

       Selected B, C5 upvotes

       How can E be correct?? Bare Metal doesn't "provide" anything... and certainly not the hypervisor. BTW it also states "related to application development", so what does using BM imply? --> BM is suitable for legacy application etc etc and BM provides (this time yes! It provides...!) access to hardware features.

    3. C

       CCNPTT

       2021-07-23

       5 upvotes

       B and C "provides the hypervisor to host virtual servers" Not true for bare metal environmets. This is related to IaaS/Paas cloud providers, they actually provide the virtualization and the organization install the VMs on top of th ehypervisor.

    4. C

       CiscoNinja

       2021-07-14

       5 upvotes

       B&C. I would only care about AWS if this was an amazon cert exam.

11. Question 11 of 25

    What is a benefit of using edge computing in an IoT implementation?

    • Ahigh speed in data processing
    • Blow network design complexity
    • Clow cost in network design
    • Dhigh availability for network components

    Show answer

    Correct answer: A

    How others answered

    • A100%

    Explanation

    Should be A. With edge computing, you let local processing of data occur closer to the actual sensors and devices where it can be acted on more quickly.

    Adapted from community discussion by DenskyDen · 2022-11-02 · 33 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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    • cisco.com documentation
    • redhat.com documentation
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    Question 11 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. D

       DenskyDen

       2022-11-02

       33 upvotes

       Should be A. With edge computing, you let local processing of data occur closer to the actual sensors and devices where it can be acted on more quickly.

    2. S

       snowbow

       2022-12-06

       10 upvotes

       This is such a stupid question, Cisco's own posts basically show that all of these options is correct: https://blogs.cisco.com/internet-of-things/edge-computing-benefits-and-iot-use-cases

    3. M

       macxsz

       2023-12-19

       Selected A2 upvotes

       Should be A. D is referring to availability of parts which seems to be totally unrelated. "With edge computing, you let local processing of data occur closer to the actual sensors and devices where it can be acted on more quickly"

    4. A

       aplicacion101

       2024-03-14

       1 upvote

       A is correct. https://www.redhat.com/en/topics/edge-computing/iot-edge-computing-need-to-work-together Edge computing is a local source of processing and storage for the data and computing needs of IoT devices. Here are some of the benefits of using IoT and edge together: -Reduced latency of communication between IoT devices and the central IT networks. -Faster response times and increased operational efficiency. -Improved network bandwidth. -Continued systems operation offline when a network connection is lost. -Local data processing, aggregation, and rapid decision making via analytics algorithms and machine learning.

12. Question 12 of 25

    What should a CI/CD pipeline aim to achieve?

    • Ato require minimal manual interaction
    • Bto allow manual testing before deployment
    • Cto support new deployments on a fixed monthly schedule
    • Dto provide a documented process for feedback

    Show answer

    Correct answer: A

    How others answered

    • A100%

    Explanation

    The aim of CI/CD and DevOps in general is to automate software delivery with minimal manual human interaction, answer is A. There is no fixed software delivery frequency not whatsoever

    Adapted from community discussion by blinksink · 2021-06-30 · 18 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

    Supporting references

    • redhat.com documentation

    View community discussion4

    Candidate context

    Question 12 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. B

       blinksink

       2021-06-30

       18 upvotes

       The aim of CI/CD and DevOps in general is to automate software delivery with minimal manual human interaction, answer is A. There is no fixed software delivery frequency not whatsoever

    2. G

       Gngogh

       2021-12-28

       6 upvotes

       How can the correct answer be B?? manual testing was already possible before CI/CD came into play. Correct answer must be A.

    3. J

       Johnconnor2021

       2021-08-21

       1 upvote

       yes, besides says FIXED MONTHLY. but CI/CD can happen daily or weekly, doesn't follow an exact schedule

    4. C

       cat9105axi

       2021-06-17

       1 upvote

       I would say C may be correct as well since CI/CD is all about constant flows of software upgrade.

13. Question 13 of 25

    Select 2

    What are two advantages of YANG-based approaches for infrastructure automation? (Choose two.)

    • Amulti-platform vendor abstraction
    • Bcompiles to executables that run on network devices
    • Cdesigned to reflect networking concepts
    • Ddirectly maps to JavaScript
    • Ecommand line driven interface

    Show answer

    Correct answer: A, C

    How others answered

    • AC100%

    Explanation

    B is incorrect, because YANG is not a compiled / binary you can execute on a network device, it is a data-model (it describes how data is presented and interpreted), and it normally goes XML+YANG or JSON+YANG. I'll go A and C

    Adapted from community discussion by Cheporing · 2023-07-06 · 3 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

    Supporting references

    • Cisco documentation

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    Candidate context

    Question 13 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. M

       macxsz

       2024-06-19

       Selected A, C4 upvotes

       A is Very obvious. For the other one maybe C as only C makes sense

    2. C

       Cheporing

       2023-07-06

       3 upvotes

       B is incorrect, because YANG is not a compiled / binary you can execute on a network device, it is a data-model (it describes how data is presented and interpreted), and it normally goes XML+YANG or JSON+YANG. I'll go A and C

    3. U

       unnamed23

       2023-09-09

       3 upvotes

       DEVASC Course 8.3.2. YANG was originally designed for networking data models. There are two types of YANG models, open and native.

    4. I

       ionycash

       2023-06-21

       1 upvote

       B: https://www.cisco.com/c/en/us/support/docs/storage-networking/management/200933-YANG-NETCONF-Configuration-Validation.html

14. Question 14 of 25

    Which toot allows changes to the configuration management toolset to be tested?

    • ApyATS
    • BNAPALM
    • CCisco VIRL
    • DAnsible

    Show answer

    Correct answer: C

    How others answered

    • C75%
    • A25%

    Explanation

    The questions talks about changes to "configuration management toolset". The way I understand it, is that if I want to make changes to how I use Ansible / Puppet / etc. (config management tools), I want to test my implementation of Puppet somewhere. In that case, "Cisco VIRL" is the right answer. Opinions?

    Adapted from community discussion by kymoni · 2024-04-13 · 2 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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    • cisco.com documentation
    • cisco.com documentation

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    Question 14 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. W

       whiney

       2021-06-26

       4 upvotes

       correct answer should be A: https://developer.cisco.com/docs/pyats/#!introduction/cisco-pyats-network-test--automation-solution

    2. K

       kymoni

       2024-04-13

       Selected C2 upvotes

       The questions talks about changes to "configuration management toolset". The way I understand it, is that if I want to make changes to how I use Ansible / Puppet / etc. (config management tools), I want to test my implementation of Puppet somewhere. In that case, "Cisco VIRL" is the right answer. Opinions?

    3. [

       [Removed]

       2022-03-25

       1 upvote

       Cisco pyATS: Cisco pyATS is a Python framework for creating automated tests and validations. Everything from device to network or even web GUI features can be tested. It enables developers to construct small test cases that can later scale with infrastructure. Cisco pyATS is available at https://developer.cisco.com/pyats/.

    4. P

       Pierre_Bouvier

       2024-11-08

       1 upvote

       pyATS is used for testing, while VIRL is used for simulation.

15. Question 15 of 25

    

    Refer to the exhibit. Which workflow does the script automate?

    • Aretrieves a media server that is being monitored
    • Bupdates a media server that is being monitored
    • Cadds a media server to be monitored
    • Ddeletes a media server that is being monitored

    Show answer

    Correct answer: C

    How others answered

    • C100%

    Explanation

    I agree with AJ7428. Since it is using "POST" method this creates something new. If it was updating something, it would use "PUT" or "PATCH"

    Adapted from community discussion by ThePokemonNuzlockingMaster · 2023-05-13 · 3 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

    Supporting references

    • cisco.com documentation

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    Candidate context

    Question 15 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. G

       ghrrman54

       2023-07-16

       Selected C7 upvotes

       If y'all still curious. Here's the answer. It's C of course https://developer.cisco.com/meraki/api/#!get-organization-insight-monitored-media-servers

    2. T

       ThePokemonNuzlockingMaster

       2023-05-13

       Selected C3 upvotes

       I agree with AJ7428. Since it is using "POST" method this creates something new. If it was updating something, it would use "PUT" or "PATCH"

    3. R

       ronnietherocket

       2024-03-30

       Selected C3 upvotes

       POST creates a resource. PUT replaces a resource. PATCH updates a resource.

    4. P

       Pateras_

       2023-10-17

       1 upvote

       POST method is for updating, and the only answer where it is updating something it is B. Shouldn't B the answer. I look at the developers site in CISCO and i have seen the same. Maybe i am wrong, but can someone help me understand this.

16. Question 16 of 25

    Select 2

    What are two considerations when selecting the `best route` for a network device to reach its destination? (Choose two.)

    • AMAC address
    • BIP address
    • Cmetrics
    • Dadministrative distance
    • Esubnet mask

    Show answer

    Correct answer: C, D

    How others answered

    • CD57%
    • DE43%

    Only 57% agreed on this answer — treat it as contested rather than settled.

    Explanation

    C D I see what you guys are saying but if you have two exact same mask it doesn't matter, it takes the prefix not the mask itself (even when it depends on the mask)

    Adapted from community discussion by Need_to_pass · 2022-06-25 · 2 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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    • Cisco documentation

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    Question 16 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. K

       Kondogbia3

       2022-01-20

       4 upvotes

       What about Longest prefix match? Subnet mask matter in the decision..

    2. A

       aplicacion101

       2022-09-14

       Selected C, D1 upvote

       A router o switch3 use AD to selecting the source of routing what it'll install in the routing table, later it use the value of metric to selecting the best route when forward the packets. El package with the IP address that has the best match will fordward to out interface Netmask is use to determinate if the hosts are in the same network o diferents networks. So C: metrics and D. administrative distance are corrects

    3. N

       Need_to_pass

       2022-06-25

       Selected C, D2 upvotes

       C D I see what you guys are saying but if you have two exact same mask it doesn't matter, it takes the prefix not the mask itself (even when it depends on the mask)

    4. Y

       ymmit78

       2023-09-21

       3 upvotes

       The route selection process is as follows: 1. longest match (smallest subnet mask) 2. lowest AD 3. lowest Metric

17. Question 17 of 25

    

    Refer to the exhibit. Which HTTP code is returned after the RESTCONF query is executed?

    • A201
    • B204
    • C302
    • D304

    Show answer

    Correct answer: A

    How others answered

    • A83%
    • B17%

    Explanation

    I can't delete my other comment. I think A is correct - not B. I kept searching and found another resource: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/171/b_171_programmability_cg/restconf_protocol.html#reference_64683574281833241652455754795825 there, the same request is used with curl - the response code is 201

    Adapted from community discussion by herrmann69 · 2024-08-14 · 5 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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    • Cisco documentation
    • Cisco documentation

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    Question 17 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. H

       herrmann69

       2024-08-14

       Selected A5 upvotes

       I can't delete my other comment. I think A is correct - not B. I kept searching and found another resource: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/171/b_171_programmability_cg/restconf_protocol.html#reference_64683574281833241652455754795825 there, the same request is used with curl - the response code is 201

    2. R

       rtg2123

       2023-08-28

       2 upvotes

       I think A is correct because is a POST operation and if successful it is expected to have status code 201 - Created. I have found something similar to this here: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/166/b_166_programmability_cg/restconf_prog_int.pdf

18. Question 18 of 25

    An engineer needs to collect information about 20,000 Bluetooth clients using the Cisco Meraki API. The API returns only 1,000 results. One of the HTTP response headers has the data: Link: https://api.meraki.com.info/api/v0/networks/ABC/bluetoothClients?perPage=1000&startingAfter=1000>;rel=“next” Which RFC is implemented by the API to apply the restriction?

    • ARFC 5988 – Web Linking
    • BRFC 5890 – Response Constraints
    • CRFC 5005 – Feed Paging and Archiving
    • DRFC 5446 – Content Limits

    Show answer

    Correct answer: A

    How others answered

    • A54%
    • C46%

    Only 54% agreed on this answer — treat it as contested rather than settled.

    Explanation

    A. RFC 5988 – Web Linking The API implements the Web Linking, specified in the RFC 5988 which defines a mechanism for representing links in HTTP headers. This allows to provide a way to navigate through the data that is being returned by the API. The Link header returned in the API response is using the "next" relation that specifies the link to the next page of the results, this is a standard way of paginating the results, it is used by the API to return only a subset of the total data and provide a way to navigate through the pages. RFC 5890, RFC 5005, and RFC 5446 do not specify any mechanism related to pagination or data restriction in HTTP headers.

    Adapted from community discussion by r0m · 2024-01-15 · 6 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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    • RFC Editor
    • cisco.com documentation

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    Question 18 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. R

       r0m

       2024-01-15

       Selected A6 upvotes

       A. RFC 5988 – Web Linking The API implements the Web Linking, specified in the RFC 5988 which defines a mechanism for representing links in HTTP headers. This allows to provide a way to navigate through the data that is being returned by the API. The Link header returned in the API response is using the "next" relation that specifies the link to the next page of the results, this is a standard way of paginating the results, it is used by the API to return only a subset of the total data and provide a way to navigate through the pages. RFC 5890, RFC 5005, and RFC 5446 do not specify any mechanism related to pagination or data restriction in HTTP headers.

    2. D

       daniii89

       2025-02-03

       Selected A1 upvote

       Correct Answer A RFC 5988 Web Linking Explanation The Cisco Meraki API is using pagination to limit the number of results returned in a single request The Link header in the HTTP response includes a rel next reference which provides the URL to retrieve the next set of results This behavior follows RFC 5988 Web Linking which defines a standard for indicating relationships between web resources including pagination links rel next rel prev Why not the other options B RFC 5890 Response Constraints This RFC deals with Internationalized Domain Names IDNs not API pagination C RFC 5005 Feed Paging and Archiving This RFC is about pagination in Atom feeds not general API pagination D RFC 5446 Content Limits This RFC is related to media streaming constraints not API responses Since RFC 5988 defines Web Linking including how APIs provide pagination information it is the correct answer

    3. J

       jago83

       2024-04-21

       3 upvotes

       I think the correct is A. This is a sentence from the DEVASC training material that you can buy from cisco store to learn online: In the case of Cisco, pagination is a part of the Cisco Web API standards and is implemented with RFC 5988 (EU: aka Web Linking). EXAMPLE - WEBEX ---------------------------------- https://developer.webex.com/docs/basics The Webex APIs implement the RFC5988 (Web Linking) standard for pagination. When requesting a list of resources the response may contain a Link header containing the URLs to the first, next, and previous page.

    4. W

       Woonesuf

       2024-02-23

       2 upvotes

       This is correct. Directly from the link: "Paged feeds can be useful when the number of entries is very large, infinite, or indeterminate. Clients can "page" through the feed, only accessing a subset of the feed's entries as necessary."

19. Question 19 of 25

    Refer to the exhibit.

    

    What does the Python function do?

    • AIt returns HTTP Basic Authentication.
    • BIt returns DNAC user and password.
    • CIt reads a token from a local JSON file and posts the token to the DNAC URL.
    • DIt returns an authorization token.

    Show answer

    Correct answer: D

    How others answered

    • D89%

    Explanation

    import requests from requests.auth import HTTPBasicAuth def get_auth_token(): url = 'https://sandboxdnac.cisco.com/dna/system/api/v1/auth/token' resp = requests.post(url, auth=HTTPBasicAuth("devnetuser", "Cisco123!")) token = resp.json()['Token'] print(token) return token I think it is D, as the print out is: eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJzdWIiOiI1ZTlkYmI3NzdjZDQ3ZTAwNGM2N2RkMGUiLCJhdXRoU291cmNlIjoiaW50ZXJuYWwiLCJ0ZW5hbnROYW1lIjoiVE5UMCIsInJvbGVzIjpbIjVkYzQ0NGQ1MTQ4NWM1MDA0YzBmYjIxMiJdLCJ0ZW5hbnRJZCI6IjVkYzQ0NGQzMTQ4NWM1MDA0YzBmYjIwYiIsImV4cCI6MTU5NDMwNjI0OSwiaWF0IjoxNTk0MzAyNjQ5LCJqdGkiOiIwY2Q5YjQyYy1iNWU2LTQ5ZTEtODVjZC1mZWI2MWY2NjQ5ZjYiLCJ1c2VybmFtZSI6ImRldm5ldHVzZXIifQ.OZk5uvMSmC2wG7AIXND_0FNdxTRgpXwiVnO2Vi4eM3uoGV28zYV4da12kchBKvqO9Rkc3SYppCzZXK_bVZ7jObKkWN6SBF_KFUo3avoFee-XCgzznTd2NBBoyu_0fyBinWwF_NX3tIQRX4TMgHdvKtKBVeYPAtSE-qHDUGVLAA7VoWuDipE-ktvo4BigYfSptXxTRtTOa1_vTsrwQ0PGiLWNzKA6ruBiCb8i_Tgo7x93MUp0tNy5866Fn51Ix8lcIhW1D0eRCTOZNe-J2e0QYNrAV1Xtv3zpS1p75joEq0kpdjon7NB6lGjFeUV_vGR9IXTQVhKY6KDan7SgCpMvUQ

    Adapted from community discussion by xXAzazelXx · 2021-01-09 · 15 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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    • cisco.com documentation
    • cisco.com documentation
    • cisco.com documentation

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    Candidate context

    Question 19 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. R

       Requium

       2020-12-12

       55 upvotes

       D: https://developer.cisco.com/learning/lab/dnav3-dnac-nbapi-hello-world/step/4

    2. X

       xXAzazelXx

       2021-01-09

       15 upvotes

       import requests from requests.auth import HTTPBasicAuth def get_auth_token(): url = 'https://sandboxdnac.cisco.com/dna/system/api/v1/auth/token' resp = requests.post(url, auth=HTTPBasicAuth("devnetuser", "Cisco123!")) token = resp.json()['Token'] print(token) return token I think it is D, as the print out is: eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJzdWIiOiI1ZTlkYmI3NzdjZDQ3ZTAwNGM2N2RkMGUiLCJhdXRoU291cmNlIjoiaW50ZXJuYWwiLCJ0ZW5hbnROYW1lIjoiVE5UMCIsInJvbGVzIjpbIjVkYzQ0NGQ1MTQ4NWM1MDA0YzBmYjIxMiJdLCJ0ZW5hbnRJZCI6IjVkYzQ0NGQzMTQ4NWM1MDA0YzBmYjIwYiIsImV4cCI6MTU5NDMwNjI0OSwiaWF0IjoxNTk0MzAyNjQ5LCJqdGkiOiIwY2Q5YjQyYy1iNWU2LTQ5ZTEtODVjZC1mZWI2MWY2NjQ5ZjYiLCJ1c2VybmFtZSI6ImRldm5ldHVzZXIifQ.OZk5uvMSmC2wG7AIXND_0FNdxTRgpXwiVnO2Vi4eM3uoGV28zYV4da12kchBKvqO9Rkc3SYppCzZXK_bVZ7jObKkWN6SBF_KFUo3avoFee-XCgzznTd2NBBoyu_0fyBinWwF_NX3tIQRX4TMgHdvKtKBVeYPAtSE-qHDUGVLAA7VoWuDipE-ktvo4BigYfSptXxTRtTOa1_vTsrwQ0PGiLWNzKA6ruBiCb8i_Tgo7x93MUp0tNy5866Fn51Ix8lcIhW1D0eRCTOZNe-J2e0QYNrAV1Xtv3zpS1p75joEq0kpdjon7NB6lGjFeUV_vGR9IXTQVhKY6KDan7SgCpMvUQ

    3. J

       julian_1306

       2023-12-19

       Selected D4 upvotes

       Its the D seach here (ctrl + f ) for : will return an Authorization Token The cisco page says that return authorization token , so de discustion over authorization and authentication is ended . and also its super obvios that return a token. https://developer.cisco.com/site/dnac-101/

    4. F

       FireTv

       2020-12-22

       5 upvotes

       Must be D. url --> Endpoint URL resp --> Make the POST Request; and get a response of that request token = resp.json()['Token'] --> Retrieve the Token from the returned response in JSON format.

20. Question 20 of 25

    Which action resolves a 401 error in response to an HTTP GET that is issued to retrieve a configuration statement using RESTCONF on a CSR 1000V?

    • AChange the HTTP method to PUT.
    • BCheck the MIME types in the HTTP headers.
    • CChange the transport protocol to HTTPS.
    • DCheck the authentication credentials.

    Show answer

    Correct answer: D

    How others answered

    • D100%

    Explanation

    Tested this on Postman against CSR1K sandbox: HTTP+right auth creds===> 400 Bad request HTTPS+bad auth creds===> 401 Unauthorized HTTP+bad auth cred===> 400 Bad request I am inclined to D, I think they just used HTTP GET to specify the method because I dont recall seeing HTTPS GET or HTTPS POST anywhere.

    Adapted from community discussion by blinksink · 2021-12-30 · 4 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

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    • cisco.com documentation
    • Cisco documentation
    • cisco.com documentation

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    Candidate context

    Question 20 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. B

       blinksink

       2021-12-30

       4 upvotes

       Tested this on Postman against CSR1K sandbox: HTTP+right auth creds===> 400 Bad request HTTPS+bad auth creds===> 401 Unauthorized HTTP+bad auth cred===> 400 Bad request I am inclined to D, I think they just used HTTP GET to specify the method because I dont recall seeing HTTPS GET or HTTPS POST anywhere.

    2. S

       SAGA

       2022-02-03

       3 upvotes

       RESTCONF works on HTTP or HTTPS https://developer.cisco.com/docs/standard-network-devices/#!enabling-restconf-on-ios-xe/addressing-and-ports

    3. P

       Philbert919

       2021-07-28

       3 upvotes

       its a typical cisco question ... restconf is used what transport does restconf use? (https)

    4. 5

       5tuple

       2021-09-06

       1 upvote

       I would say the correct answer is D. The reason why I got the conclusion is that, by default, ISO XE needs to use HTTPS verbs. From documentation: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/167/b_167_programmability_cg/restconf_programmable_interface.html#concept_hjq_bgx_51b "Step 4 Device(config)# ip http secure-server Enables a secure HTTP (HTTPS) server." "Example: Configuring the RESTCONF Protocol RESTCONF Requests (HTTPS Verbs):"

21. Question 21 of 25

    How does requesting a synchronous API operation differ from requesting an asynchronous API operation?

    • Aclients receive responses with a task ID for further processing
    • Bclients subscribe to a webhook for operation results
    • Cclients poll for the status of the execution of operations
    • Dclients can access the results immediately

    Show answer

    Correct answer: D

    How others answered

    • D84%
    • C16%

    Explanation

    D https://www.techtarget.com/whatis/definition/synchronous-asynchronous-API What is the difference between synchronous and asynchronous APIs? Synchronous and asynchronous APIs differ in the following ways: Synchronous APIs: With synchronous APIs, the expectation is that data will be returned immediately. An API is usually synchronous when data or service availability, resources and connectivity are high and low latency is a requirement. Asynchronous APIs: Asynchronous APIs are also known as async APIs. With an asynchronous process, the availability of a resource, service or data store may not be immediate. The API may have to wait for a backend response. These APIs may provide a callback notification to the requester when the requested resource is ready. Asynchronous requests are useful in maintaining an application's functionality rather than tying up its resources waiting on a request. An API may be asynchronous where data or service availability and connectivity is low or oversaturated with demand.

    Adapted from community discussion by nospampls · 2024-05-24 · 4 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

    Supporting references

    • cisco.com documentation
    • cisco.com documentation

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    Candidate context

    Question 21 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. M

       MrBond_007

       2022-06-03

       45 upvotes

       It's D. With synchronous API the clients can access the results immediately.

    2. N

       nospampls

       2024-05-24

       Selected D4 upvotes

       D https://www.techtarget.com/whatis/definition/synchronous-asynchronous-API What is the difference between synchronous and asynchronous APIs? Synchronous and asynchronous APIs differ in the following ways: Synchronous APIs: With synchronous APIs, the expectation is that data will be returned immediately. An API is usually synchronous when data or service availability, resources and connectivity are high and low latency is a requirement. Asynchronous APIs: Asynchronous APIs are also known as async APIs. With an asynchronous process, the availability of a resource, service or data store may not be immediate. The API may have to wait for a backend response. These APIs may provide a callback notification to the requester when the requested resource is ready. Asynchronous requests are useful in maintaining an application's functionality rather than tying up its resources waiting on a request. An API may be asynchronous where data or service availability and connectivity is low or oversaturated with demand.

    3. K

       khuiper

       2023-01-13

       7 upvotes

       200-901 certification guide specify the following: "the main difference between synchronous and asynchronous APIs is that a synchronous API waits for other aspects of the code to complete prior to moving on and processing additional code". So D may be the correct answer.

    4. R

       richard2865

       2022-10-13

       5 upvotes

       The problem is the question. It is worded like crap. Sync waits for the response and async uses webhooks. I am going with D.

22. Question 22 of 25

    Which method should be used to safely store the API keys?

    • Ain an environment variable unique to the system database
    • Bencrypted in a configuration file that is separate from the code
    • Cplain text in the code as a constant
    • Dencrypted in the code in a function

    Show answer

    Correct answer: A

    How others answered

    • A55%
    • B45%

    Only 55% agreed on this answer — treat it as contested rather than settled.

    Explanation

    It's A Definitely please see https://developer.cisco.com/codeexchange/github/repo/cldeluna/creds_in_env/ "Environment Variables Set credentials and keys as environment variables that your script can access during runtime. In fact these can be set interactively (think CLI) and via a file as well (look for .env or .ini files in repositories and you now know what they are) For me, environment variables made the most sense"

    Adapted from community discussion by lowfell · 2021-07-21 · 8 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

    Supporting references

    • cisco.com documentation
    • cisco.com documentation
    • Google Cloud documentation
    • Google developer documentation

    View community discussion4

    Candidate context

    Question 22 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. [

       [Removed]

       2021-08-23

       20 upvotes

       A https://developer.cisco.com/codeexchange/github/repo/obrigg/meraki-channel-distribution/

    2. L

       lowfell

       2021-07-21

       8 upvotes

       It's A Definitely please see https://developer.cisco.com/codeexchange/github/repo/cldeluna/creds_in_env/ "Environment Variables Set credentials and keys as environment variables that your script can access during runtime. In fact these can be set interactively (think CLI) and via a file as well (look for .env or .ini files in repositories and you now know what they are) For me, environment variables made the most sense"

    3. E

       examtaker_2021

       2021-08-07

       5 upvotes

       I am kind of convinced with A after I read google link and use Postman for API practice.

    4. W

       wilie

       2021-03-28

       4 upvotes

       A is the correct answer B is wrong because configuration files have to be read by the application encrypting it will cause an over head and add one extra key which you will have to deal with again

23. Question 23 of 25

    Select 2

    Which two use cases are supported by Meraki APIs? (Choose two.)

    • ABuild location-aware apps from Wi-Fi and LoRaWAN devices.
    • BBuild a custom Captive Portal for Mobile Apps.
    • CConfigure network devices via the Dashboard API.
    • DDeploy applications onto the devices.
    • ERetrieve live streams from a Meraki Camera.

    Show answer

    Correct answer: C, E

    How others answered

    • CE80%
    • BC20%

    Explanation

    B&C are the correct answers. Take a look at the DevNet programmability basic videos, https://developer.cisco.com/video/net-prog-basics/ There are 3 main functions that meraki API provides: Dashboard API, Scanning API and Captive Portal API

    Adapted from community discussion by Leonhrz · 2021-01-13 · 16 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

    Supporting references

    • cisco.com documentation
    • cisco.com documentation
    • cisco.com documentation
    • cisco.com documentation

    View community discussion4

    Candidate context

    Question 23 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. L

       Leonhrz

       2021-01-13

       16 upvotes

       B&C are the correct answers. Take a look at the DevNet programmability basic videos, https://developer.cisco.com/video/net-prog-basics/ There are 3 main functions that meraki API provides: Dashboard API, Scanning API and Captive Portal API

    2. D

       daniaprincipal

       2021-01-18

       6 upvotes

       It looks like be more B and C: The Meraki enterprise cloud-managed networking infrastructure service has five different APIs for integration. They are the: • Dashboard API, a RESTful service for device provisioning, management, and monitoring. • Webhook API, a real-time notification system for network alerts, covering events and network health • Location Streaming API, an HTTP POST method providing Wi-Fi and Bluetooth client location information (GPS, X/Y) based on Meraki Access Point (AP) map placement, and client signal strength. • External Captive Portal (EXCAP) API, enabling an organization to build out custom engagement models at Wi-Fi access points. • MV Sense API, a combination of REST APIs and realtime MQTT stream supporting oversight of a physical space.

    3. C

       CCNPTT

       2021-01-23

       8 upvotes

       B and C https://developer.cisco.com/meraki/captive-portal-api/#!overview/introduction-to-captive-portal-api

    4. R

       rutiger

       2021-09-30

       4 upvotes

       this question is terrible. but that's what you get when a non meraki person writes the exam. a - is for sure not correct. there's no LoRaWAN in meraki. b - poorly worded. does this mean the built in captive portal in dashboard? does it mean excap? and i'd think this should say mobile devices not apps. and yes, meraki api does allow for configuration of the splash page. so, it seems this one could also be true. c - this one is for sure correct d - POST/networks/{networkId}/sm/devices/{deviceId}/installApps part of systems manager. so this one is correct. e - GET/devices/{serial}/camera/videoLink used without a timestamp will generate a link to live video in dashboard. so, for me this one is also correct. has nothing to do with rtsp.

24. Question 24 of 25

    Which API is used to obtain data about voicemail ports?

    • AWebex Teams
    • BCisco Unified Communications Manager
    • CFinesse Gadgets
    • DWebex Devices

    Show answer

    Correct answer: B

    How others answered

    • B100%

    Explanation

    B is correct: Cisco Unified Communications Manager (CUCM) provides API access to data management, call management, and voicemail integration. Source: Cisco DevNet Fundamental Course: https://developer.cisco.com/certification/fundamentals/

    Adapted from community discussion by daniaprincipal · 2022-07-18 · 19 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

    Supporting references

    • cisco.com documentation
    • cisco.com documentation
    • cisco.com documentation

    View community discussion4

    Candidate context

    Question 24 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. A

       Alan2036

       2022-06-22

       41 upvotes

       vociemail should be the function of CUCM, so , I think the answer is CUCM

    2. D

       daniaprincipal

       2022-07-18

       19 upvotes

       B is correct: Cisco Unified Communications Manager (CUCM) provides API access to data management, call management, and voicemail integration. Source: Cisco DevNet Fundamental Course: https://developer.cisco.com/certification/fundamentals/

    3. T

       toto2

       2022-08-28

       8 upvotes

       The key to the question is to obtain data about voicemail ports, not voicemails. This would be CUCM and not Teams. https://developer.cisco.com/docs/axl/#!what-is-axl/what-is-administrative-xml shows the CUCM AXL API can work with voice mail ports.

    4. J

       JTDEVOPS

       2023-12-13

       3 upvotes

       B is correct Regarding netacad course: What you can do with AXL You can perform almost every action with AXL that you can with the Unified CM Administration Console web GUI. Examples of things that can be provisioned with AXL include but are not limited to: Unified CM Groups Call Park Directory Numbers (DNs) Call Pickup Groups Calling Search Spaces Computer Telephony Integration (CTI) Route Points Device Pools Device Profiles Dial Plan Tags Dial Plans Digit Discard Instructions Directory Numbers Gateways (Analog, T1, PRI) Locations Media Gateway Control Protocol (MGCP) Devices Phones Process Nodes Process Node Services Regions Route Filters Route Groups Route Lists Route Partitions Service Parameters Translation Patterns Users Voice Mail Ports

25. Question 25 of 25

    DRAG DROP -

    

    Refer to the exhibit. Drag and drop the code from the bottom onto the blanks in the code to construct a cURL command using the Cisco DNA Center API, which will provide the details of a WLAN controller with Id ab123456789. Not all options are used. Select and Place:

    

    This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.

    Show the answer figure

    Answer

    Explanation

    The correct answer is "/network-device/{id}/wireless-info" to return the wireless LAN controller info with the given device ID. URL: /dna/intent/api/v1/network-device/{id}/wireless-info From: https://developer.cisco.com/docs/dna-center/api/1-3-3-x/

    Adapted from community discussion by designated · 2022-08-15 · 12 community upvotes. Third-party contribution; reviewed by our quality filter, not independently verified.

    Supporting references

    • cisco.com documentation
    • cisco.com documentation

    Answer figure

    

    View community discussion4

    Candidate context

    Question 25 discussion

    These are quality-filtered excerpts from third-party community discussion. They can be useful reasoning signals, but they are not official answers and have not been independently verified by 200-901 or CertExamHQ.

    1. D

       designated

       2022-08-15

       12 upvotes

       The correct answer is "/network-device/{id}/wireless-info" to return the wireless LAN controller info with the given device ID. URL: /dna/intent/api/v1/network-device/{id}/wireless-info From: https://developer.cisco.com/docs/dna-center/api/1-3-3-x/

    2. S

       Str1der

       2022-09-26

       12 upvotes

       I find this question quite bizarre. How on earth are you supposed to know potentially thousands of URI's off the top of your head? They could ask for literally anything...

    3. A

       Angryeyebrows

       2023-01-24

       10 upvotes

       API's that change as well. This is one of the reasons i'll always use dumps.

    4. B

       bea89

       2022-12-17

       3 upvotes

       Correct, it should be /dna/intent/api/v1/network-device/{id}/wireless-info Check it out: https://developer.cisco.com/docs/dna-center/#!cisco-dna-center-2-1-2-x-api-api-devices-get-wireless-lan-controller-details-by-id

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200-901 practice, question 1 of 25