350-401 practice questions 761–770

1. Question 761 · 1003 in bank

   An engineer applies this EEM applet to a router:

   

   What does the applet accomplish?

   • AIt generates a syslog message every 600 seconds on the status of the specified MAC address.
   • BIt compares syslog output to the MAC address table every 600 seconds and generates an event when no match is found.
   • CIt compares syslog output to the MAC address table every 600 seconds and generates an event when there is a match.
   • DIt checks the MAC address table every 600 seconds to see if the specified address has been learned.

   Show answer

   Answer: D

   Explanation

   This one is tricky. Please, pay attention to the wordings. With the command “show ip arp | in 0005.4278.9866”, the “ARPR” text is only found if this MAC address has been learned in the router. Answer A is not correct as the syslog message is only generated if the specific MAC address is found (not every 600 seconds).

   Source: Adapted from community discussion — TroyMcLure

   References

   • Cisco documentation

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2. Question 762 · 1003 in bank

   SIMULATION - Guidelines - This is a lab item in which tasks will be performed on virtual devices. • Refer to the Tasks tab to view the tasks for this lab item. • Refer to the Topology tab to access the device console(s) and perform the tasks. • Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window. • All necessary preconfigurations have been applied. • Do not change the enable password or hostname for any device. • Save your configurations to NVRAM before moving to the next item. • Click Next at the bottom of the screen to submit this lab and move to the next question. • When Next is clicked, the lab closes and cannot be reopened. Topology -

   

   Tasks - Implement GLBP between DISTRO-SW1 and DISTRO-SW2 on VLAN100 for hosts connected to ACCESS-SW1 to achieve these goals: 1. Configure group 30 using the virtual IP address of 192.168.1.254. 2. Configure DISTRO-SW1 as the AVG using a priority value of 130. 3. If DISTRO-SW1 suffers a failure and recovers, ensure that it automatically resumes the AVG role after waiting for a minimum of 35 seconds.

   

   

   

   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: See figure below

   Explanation

   Primary Switch: interface Vlan100 ip address 192.168.1.2 255.255.255.0 glbp 30 ip 192.168.1.254 glbp 30 priority 130 glbp 30 preempt delay minimum 35 end Secondary Switch: interface Vlan100 ip address 192.168.1.3 255.255.255.0 glbp 30 ip 192.168.1.254 https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp-15-mt-book/Configuring-GLBP.html

   Source: Adapted from community discussion — olaniyijt

   References

   • Cisco documentation

   

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3. Question 763 · 1003 in bank

   Which authorization framework gives third-party applications limited access to HTTP services?

   • AIPsec
   • BGRE
   • CBasic Auth
   • DOAuth 2.0

   Show answer

   Answer: D

   Explanation

   Seems to be correct. https://auth0.com/docs/authenticate/protocols/oauth "The OAuth 2.0 authorization framework is a protocol that allows a user to grant a third-party web site or application access to the user's protected resources, without necessarily revealing their long-term credentials or even their identity." https://auth0.com/intro-to-iam/what-is-oauth-2 "...is a standard designed to allow a website or application to access resources hosted by other web apps on behalf of a user."

   Source: Adapted from community discussion — HungarianDish_111

   References

   • Oracle documentation

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4. Question 764 · 1003 in bank

   How does Cisco Express Forwarding switching differ from process switching on Cisco devices?

   • ACisco Express Forwarding switching saves memory by storing adjacency tables in dedicated memory on the line cards, and process switching stores all tables in the main memory.
   • BCisco Express Forwarding switching uses adjacency tables built by the CDP protocol, and process switching uses the routing table.
   • CCisco Express Forwarding switching uses dedicated hardware processors, and process switching uses the main processor.
   • DCisco Express Forwarding switching uses a proprietary protocol based on IS-IS for MAC address lookup, and process switching uses the MAC address table.

   Show answer

   Answer: C

   Explanation

   Cisco Express Forwarding (CEF) is a switching technology used in Cisco devices to improve packet forwarding efficiency. It is a Layer 3 IP switching technology that uses dedicated hardware processors (such as ASICs - Application-Specific Integrated Circuits) to make forwarding decisions based on information in the Forwarding Information Base (FIB) and Adjacency Table. CEF offloads packet switching from the main CPU, which allows for faster and more efficient packet forwarding. In contrast, process switching involves the main processor (CPU) of the router or switch making forwarding decisions for each packet. This method is less efficient and can result in higher CPU utilization, especially in high-traffic environments. Process switching doesn't rely on dedicated hardware processors for forwarding decisions. Option C accurately describes the difference between Cisco Express Forwarding and process switching, as CEF uses dedicated hardware processors, while process switching relies on the main CPU. The other options do not accurately describe the key differences between the two switching methods.

   Source: Adapted from community discussion — Networkchamp87

   References

   • Cisco documentation

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5. Question 765 · 1003 in bank

   

   Refer to the exhibit. What is the result of running this code?

   • AA list of lists is created.
   • BA list of new VLANs is created.
   • CAn error is displayed.
   • DA dictionary is created.

   Show answer

   Answer: B

   Explanation

   vlans_list is a python list contaning the numbers: 10 , 20 and 30 (as integers) The function "add_vlans" scan the list and 100 to every item. The result should be: [110, 120, 130] So in my opinion the answer should be: [B] - A list of new VLANs is created.

   Source: Adapted from community discussion — DavideDL

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6. Question 766 · 1003 in bank

   

   Refer to the exhibit. The administrator configures an ERSPAN session, but no packets are received on the destination host. Which action is required to complete the configuration?

   • AEnsure that the ERSPAN destination addresses are not reachable through the Mgmt-vrf VRF.
   • BEnsure that the ERSPAN destination is reachable from the switch.
   • CConfigure the ERSPAN destination VLAN as an RSPAN VLAN.
   • DEnable the ERSPAN session.

   Show answer

   Answer: D

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7. Question 767 · 1003 in bank

   

   Refer to the exhibit. Which command is required on router R1 to start receiving RESTCONF requests?

   • AR1(config)# ip http accounting commands 12 default
   • BR1(config)# ip http server
   • CR1(config)# restconf
   • DR1(config)# ip http access-class 12

   Show answer

   Answer: C

   Explanation

   The example is taken exactly from this document: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/167/b_167_programmability_cg/restconf_programmable_interface.pdf Section "Verifying RESTCONF Configuration" "The nginx process gets restrated and DMI process are started, when the restconf command is configured ... After AAA and the RESTCONF interface is configured, and nginx process and relevant DMI processes are running; the device is ready to receive RESTCONF requests."

   Source: Adapted from community discussion — HungarianDish_111

   References

   • Cisco documentation

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8. Question 768 · 1003 in bank

   Select 2

   Which two actions provide controlled Layer 2 network connectivity between virtual machines running on the same hypervisor? (Choose two.)

   • AUse a virtual switch provided by the hypervisor.
   • BUse a virtual switch running as a separate virtual machine.
   • CUse VXLAN fabric after installing VXLAN tunneling drivers on the virtual machines.
   • DUse a single routed link to an external router on stick.
   • EUse a single trunk link to an external Layer2 switch.

   Show answer

   Answer: AB

   Explanation

   The correct answer is: A. Use a virtual switch provided by the hypervisor. B. Use a virtual switch running as a separate virtual machine.

   Source: Adapted from community discussion — xziomal9

   References

   • Cisco documentation
   • Cisco documentation
   • Cisco documentation

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9. Question 769 · 1003 in bank

   What is a command-line tool for consuming REST APIs?

   • APython requests
   • BPostman
   • CcURL
   • DFirefox

   Show answer

   Answer: C

   Explanation

   Postman comes in both GUI and CLI versions, making this question vague. However, cURL is CLI-only, so I'll have to go with C.

   Source: Adapted from community discussion — JackDRipper

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10. Question 770 · 1003 in bank

    An engineer receives a report that an application exhibits poor performance. On the switch where the server is connected, this syslog message is visible: SW_MATM-4-MACFLAP_NOTIF: Host 0054.3962.7651 in vlan 14 is flapping between port Gi1/0/1 and port Gi1/0/2. What is causing the problem?

    • Aundesirable load-balancing configuration on the switch
    • Binvalid port channel configuration on the switch
    • Cwrong SFP+ and cable connected between the server and the switch
    • Dfailed NIC on the server

    Show answer

    Answer: B

    Explanation

    It's B. This is a scenario where you have two interfaces bonded together on the server, but there is no valid port channel configuration on the switch. This way the server will send always the same MAC on both interfaces, which will appear twice on the switch on both its G1/0/1 and G1/0/2 ports, rather than only once on its port-channel interface. A is wrong, actually misleading, as if anything you'd have to change load balancing on the server as a rough workaround, not on the switch. C is wrong as the interface[s] would be down, therefore no MAC flapping would occur. D is wrong as the interface[s] would be down as well.

    Source: Adapted from community discussion — Burik

    References

    • cisco.com documentation

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350-401 practice, question 761. 1003 questions available.