200-901 practice questions 241–250

1. Question 241 · 530 in bank

   A developer completed the creation of a script using Git. Before delivering it to the customer, the developer wants to be sure about all untracked files, without losing any information. Which command gathers this information?

   • Agit clean –n
   • Bgit rm –f
   • Cgit clean –r
   • Dgit rm *

   Show answer

   Answer: A

   Explanation

   The -n option will perform a “dry run” of git clean. This will show you which files are going to be removed without actually removing them. It is a best practice to always first perform a dry run of git clean. https://www.atlassian.com/git/tutorials/undoing-changes/git-clean

   Source: Adapted from community discussion — Woonesuf

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2. Question 242 · 530 in bank

   A company deploys an application via containers in its local data center. As soon as the application goes into production, it starts to crash at specific hours of the day. After investigation, it is concluded that the crashes are due to too many users accessing the application simultaneously. The spikes must be addressed and allow for future growth without discarding the investment already made. Which deployment model must be used?

   • Ahybrid cloud
   • Bedge
   • Cprivate cloud
   • Dpublic cloud

   Show answer

   Answer: A

   Explanation

   A hybrid configuration is excellent for keeping latency or security-sensitive applications close to home while accessing cloud-based resources as an extension of your infrastructure. A hybrid model also allows for the rapid deployment and deprecating of temporary equipment, eliminating the need to over-provision purchases to support business peaks. https://www.networkworld.com/article/3599213/what-are-data-centers-how-they-work-and-how-they-are-changing-in-size-and-scope.html

   Source: Adapted from community discussion — Woonesuf

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3. Question 243 · 530 in bank

   Which TCP port is used to connect to a network device by using Telnet?

   • A23
   • B69
   • C400
   • D830

   Show answer

   Answer: A

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4. Question 244 · 530 in bank

   

   Refer to the exhibit. Which action does the script perform?

   • AIt queries user credentials from Cisco IOS XE devices.
   • BIt retrieves device identification from Cisco DNA Center.
   • CIt exports SSID information from Meraki dashboard.
   • DIt collects group information from ACI.

   Show answer

   Answer: D

   Explanation

   Tenants is related to cisco ACI: "Atenant is a logical container for application policies that enable an administrator to exercise domain-based access control. A tenant represents a unit of isolation from a policy perspective, but it does not represent a private network. Tenants can represent a customer in a service provider setting, an organization or domain in an enterprise setting, or just a convenient grouping of policies." https://www.cisco.com/c/en/us/td/docs/dcn/mso/3x/configuration/cisco-multi-site-configuration-guide-aci-331/mso-configuration-aci-managing-tenants-33x.pdf

   Source: Adapted from community discussion — rtg2123

   References

   • Cisco documentation

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5. Question 245 · 530 in bank

   What is the purpose of grouping devices in a VLAN?

   • ADevices communicate as if they are connected on the same wire.
   • BMulticast network traffic is limited to the VLAN connected devices.
   • CUnicast messages are limited to the clients connected on the same VLAN.
   • DNetwork traffic is load balanced between the devices connected to the VLAN.

   Show answer

   Answer: A

   Explanation

   A is a correct option for the purpose of grouping devices in a VLAN. When devices are grouped into a VLAN, they can communicate as if they are connected on the same wire, even if they are physically located on different parts of the network. This can be useful for reducing the number of physical cables needed and for improving network performance. However, there are other purposes for grouping devices in a VLAN as well, such as limiting multicast network traffic to the VLAN connected devices and controlling which devices can communicate with each other.

   Source: Adapted from community discussion — mellohello

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6. Question 246 · 530 in bank

   An engineer prepares a set of Python scripts to interact with network devices. To avoid network performance issues, the engineer wants to run them in a test environment. Which resource must be used to monitor the live execution of code in an always-available environment?

   • Apacket tracer
   • Blearning labs
   • Csandbox
   • Dcode exchange

   Show answer

   Answer: C

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7. Question 247 · 530 in bank

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

   • Aapplication/yaml-data+json
   • Bapplication/yang-data+json
   • Capplication/xml-data+json
   • Dapplication/json-data+xml

   Show answer

   Answer: B

   Explanation

   The correct answer is B https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/166/b_166_programmability_cg/restconf_prog_int.pdf The API resource is the top-level resource located at +restconf. It supports the following media types: • Application/YANG-Data+XML OR Application/YANG-Data+JSON

   Source: Adapted from community discussion — Gabisan1112

   References

   • Cisco documentation

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8. Question 248 · 530 in bank

   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

   Answer: D

   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

   Source: Adapted from community discussion — xXAzazelXx

   References

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

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9. Question 249 · 530 in bank

   

   Refer to the exhibit. A developer is part of a team that is working on an open-source project in which source code is hosted in a public GitHub repository. While the application was built, security concerns were addressed by encrypting the credentials on the server. After a few months, the developer realized that a hacker managed to gain access to the account. The exhibit contains part of the source code for the login process. Why was the attacker able to access the developer's account?

   • AThe encoded credentials were available in the source code.
   • BThe application was not encrypting the communication with the server.
   • CThe credentials were encrypted in the source code.
   • DAn SSL certificate was used instead of the TLS protocol to authenticate.

   Show answer

   Answer: A

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10. Question 250 · 530 in bank

    Which technology is responsible for matching a name to an IP address of an application running on a host?

    • Afirewall
    • Bproxy
    • Cload balancer
    • DDNS

    Show answer

    Answer: D

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200-901 practice, question 241. 530 questions available.