300-420 practice questions 271–280

1. Question 271 · 359 in bank

   Select 2

   Which two Cisco ISE use cases typically involve the highest level of implementation complexity? (Choose two.)

   • AAsset visibility
   • BDevice management
   • CSoftware-defined segmentation
   • DSoftware-defined access
   • EGuest and wireless access

   Show answer

   Answer: CD

   Next question

2. Question 272 · 359 in bank

   Which design consideration must be made when using IPv6 overlay tunnels?

   • AOverlay tunnels that connect isolated IPv6 networks are considered a final IPv6 network architecture.
   • BOverlay tunnels should only be considered as a transition technique toward a permanent solution.
   • COverlay tunnels should be configured only between border devices and require only the IPv6 protocol stack.
   • DOverlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.

   Show answer

   Answer: B

   Explanation

   B is correct - he use of overlay tunnels should be considered as a transition technique toward a network that supports both the IPv4 and IPv6 protocol stacks or just the IPv6 protocol stack.

   Source: Adapted from community discussion — kudasay

   Next question

3. Question 273 · 359 in bank

   

   Refer to the exhibit. The distribution switches serve as the Layer 3 boundary. HSRP preemption is enabled. When the primary switch comes back after a failure, traffic is initially dropped. Which solution must be implemented to improve the design?

   • AIncrease the hello timers on both HSRP devices.
   • BUse the preempt delay feature on the backup HSRP device.
   • CUse the preempt delay feature on the primary HSRP device.
   • DConfigure a higher mac-refresh interval on both HSRP devices.

   Show answer

   Answer: C

   Explanation

   Sorry it is C. we will delayed active router to become active again for specific amount of delay that we configured so that there could be IGP running on it it will form their adjacency before becoming active and run will properly before taking over everything.

   Source: Adapted from community discussion — DOSKIM

   Next question

4. Question 274 · 359 in bank

   

   Refer to the exhibit. Where must an architect plan for route summarization for the topology?

   • Afrom the core toward the aggregation and the access toward the aggregation
   • Bfrom the core toward the aggregation and the aggregation toward the core
   • Cfrom the aggregation toward the access and the access toward the aggregation
   • Dfrom the aggregation toward the core and the aggregation toward the access

   Show answer

   Answer: D

   Explanation

   Soo.... this question is basically "you have 3 layers: core, aggregation, access. At which layer would you AGGREGATE routes?" :)

   Source: Adapted from community discussion — bogd

   Next question

5. Question 275 · 359 in bank

   

   Refer to the exhibit. The connection between SW2 and SW3 is fiber and occasionally experiences unidirectional link failure. An architect must optimize the network to reduce the change of Layer 2 forwarding loops when the link fails. Which solution should the architect include?

   • AUtilize BPDU filter on SW3.
   • BUtilize root guard on SW1.
   • CUtilize BPDU guard on SW1.
   • DUtilize loop guard on SW2.

   Show answer

   Answer: D

   Next question

6. Question 276 · 359 in bank

   Refer to the exhibit.

   

   A network engineer must design a highly available OSPF solution based on these requirements: • Traffic disruptions caused by link or node failures in Area-1 must be resolved in milliseconds. • In the event of a failure, traffic must switch to another path without waiting for the OSPF dead interval. Which fault detection solution must the engineer choose?

   • ADecrease SPF timers to 100 ms.
   • BTune the SPF delay and the OSPF LSA interval timers to 100 ms.
   • CUtilize BFD and tune the BFD timers to 100 ms.
   • DEnable IP SLA tracking for each OSPF peer.

   Show answer

   Answer: C

   Next question

7. Question 277 · 359 in bank

   

   Refer to the exhibit. The full EIGRP routing table is advertised throughout the network. Currently, users experience data loss when any one link in the network fails. An architect must optimize the network to reduce the impact when a link fails. Which solution should the architect include in the design?

   • ARun BFD on the inter links between EIGRP neighbors.
   • BSummarize the access layer networks from each access layer switch toward the aggregation layer.
   • CReduce the default EIGRP hello interval and hold time.
   • DSummarize the access layer networks from the aggregation layer toward the core layer.

   Show answer

   Answer: D

   Explanation

   The correct solution for this scenario is D. The architect should summarize the access layer networks from the aggregation layer toward the core layer to optimize the network and reduce the impact when a link fails. EIGRP is a distance-vector routing protocol that can support automatic summarization at network boundaries to reduce the size of the routing table and improve network performance. In this scenario, by summarizing the access layer networks from the aggregation layer toward the core layer, the full EIGRP routing table would be reduced in size and complexity, which would minimize the impact when a link fails.

   Source: Adapted from community discussion — SpicyMochi

   Next question

8. Question 278 · 359 in bank

   What is the purpose of a control plane node in a Cisco SD-Access network fabric?

   • Ato maintain the endpoint database and mapping between endpoints and edge nodes
   • Bto detect endpoints in the fabric and inform the host tracking database of EID-to-fabric-edge node bindings
   • Cto identify and authenticate endpoints within the network fabric
   • Dto act as the network gateway between the network fabric and outside networks

   Show answer

   Answer: A

   Explanation

   Answer A is correct. See: https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html Endpoint registration—Each edge node has a LISP control-plane session to all control plane nodes. After an endpoint is detected by the edge node, it is added to a local database called the EID-table. Once the host is added to this local database, the edge node also issues a LISP map-register message to inform the control plane node of the endpoint so the central HTDB is updated.

   Source: Adapted from community discussion — brzl

   References

   • Cisco documentation

   Next question

9. Question 279 · 359 in bank

   

   Refer to the exhibit. An architect reviews the low-level design of a company's enterprise network and advises optimizing the STP convergence time. Which functionality must be applied to Gi1/0/1-10 to follow the architect's recommendation?

   • AUplinkFast
   • Broot guard
   • CBPDU guard
   • DPortFast

   Show answer

   Answer: D

   Explanation

   I think that the answer is D. Portfast is a spanning tree's functionality, once configured It avoids the stp states (blocking, listening, learining, forwarding) every time any port among Gi1/0/1 Gi1/0/10 is connetcted again

   Source: Adapted from community discussion — Hope66

   Next question

10. Question 280 · 359 in bank

    An engineer must design a large Layer 2 domain that contains hundreds of switches and VLANs. The engineer's primary goals are to: ✑ Efficiently utilize the bandwidth of all links ✑ Avoid Layer 2 loops ✑ Cause minimal impact on switch CPU and memory Which technology should the engineer include in the design?

    • AMST
    • BRapid PVST+
    • CRSTP
    • DPVST+

    Show answer

    Answer: A

    Explanation

    I believe it is MST. MST groups a large amount of VLANS into single instances which lower the amount of CPU and memory utilization. https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24248-147.html#mst

    Source: Adapted from community discussion — MangoBingsu

    References

    • Cisco documentation

    Next question

Keyboard:J Kmove between questionsA–Dselect an answerRshow or hide the answer← →change page

300-420 practice, question 271. 359 questions available.