300-420 practice questions 61–70

1. Question 61 · 359 in bank

   DRAG DROP - Drag and drop the characteristics from the left onto the configuration protocols they describe on the right. 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: See figure below

   Explanation

   So remember that NETCONF was created before RESTCONF, RESTCONF works in conjunction with NETCONF it was created to basically help NETCONF, if you remember this you will make the obvious choice 6241 comes first

   Source: Adapted from community discussion — Clauster

   

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2. Question 62 · 359 in bank

   A company must automate a set of complex changes aligned with DR testing in the network. These changes are specific, and the DR playbook will be adjusted in the future. The playbook has diverse routing and switching assets in scope as well as multiple vendor and hardware platforms. A developer will create a thin, web front-end microservice and integrate with an Open Daylight controller to push changes to the network. Which YANG model should be used?

   • AUse an open YANG model to allow the reuse of code and standardize the implementation across platforms.
   • BDevelop an individualized YANG model to minimize development resources and time to market.
   • CUse multiple native vendor YANG models to provide code consistency.
   • DUse a single native vendor YANG model to minimize development time.

   Show answer

   Answer: A

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3. Question 63 · 359 in bank

   Select 2

   Which two routing protocols allow for unequal cost load balancing? (Choose two.)

   • AEIGRP
   • BIS-IS
   • CBGP
   • DOSPF
   • ERIPng

   Show answer

   Answer: AC

   Explanation

   Is Unequal Cost Multipath (UCMP) different than unequal cost load balancing? Is there a chance IS-IS could be one of the answers? https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/seg_routing/configuration/xe-17/segrt-xe-17-book/m_isis_ucmp.pdf

   Source: Adapted from community discussion — Lungful

   References

   • Cisco documentation

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4. Question 64 · 359 in bank

   An architect must create a QoS solution for a customer to ensure that a 40 Mbps Internet connection is shared between four subnets based on these requirements: * Each subnet must receive no less than 10 Mbps of download bandwidth during peak traffic times. * A subnet can use up to 40 Mbps during nonpeak traffic times if the other subnets are idle. * Download traffic must never experience a delay. Which solution must the architect choose?

   • Arate-limiting and shaping
   • Bbandwidth percentage and policing
   • Cshaping and policing
   • Dbandwidth percentage and rate-limiting

   Show answer

   Answer: B

   Explanation

   It cannot be shaping as traffic shaping retains excess packets in a queue and then schedules the excess for later transmission over increments of time It cannot be Rate Limiting as well as it refer to both shaping and policing What is Rate Limiting? Network rate limiting is used to limit the amount of traffic on a network. There are two main methods of rate limiting: traffic policing and traffic shaping. Traffic policing measures the rate of incoming traffic and drops packets that exceed the maximum allowed rate.

   Source: Adapted from community discussion — CKL_SG

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5. Question 65 · 359 in bank

   An engineer is designing a network for a customer running a wireless network with a common VLAN for all APs. The customer is experiencing unicast flooding in the Layer 2 network between the aggregation and access layers. The customer wants to reduce the flooding and improve convergence time. Which solution meets these requirements?

   • AMigrate all APs to a common Layer 2 access layer switch and run Layer 3 from the aggregation layer to all remaining access layer switches.
   • BAlign HSRP primary and STP root bridges and reduce ARP timers to match CAM timers on the aggregation layer switches.
   • CMigrate to a Layer 3 access campus design if the APs can run on separate VLANs.
   • DAlign HSRP primary and STP root bridges if the APs cannot run on separate VLANs.

   Show answer

   Answer: B

   Explanation

   I think B The default ARP table aging time is 4 hours while the CAM holds the entries for only 5 minutes. The switch sends out a frame to all forwarding ports within the respective VLAN when the destination MAC address is aged out from the CAM table. You need a CAM aging timer greater or equal to the ARP timeout in order to prevent unicast flooding. https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/71079-arp-cam-tableissues.html#:~:text=The%20default%20ARP%20table%20aging%20time%20is%204,ARP%20timeout%20in%20order%20to%20prevent%20unicast%20flooding.

   Source: Adapted from community discussion — Hope66

   References

   • Cisco documentation
   • Cisco documentation

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6. Question 66 · 359 in bank

   

   Refer to the exhibit. A customer wants to adopt a dynamic site-to-site VPN solution to secure communication for VoIP, video, and FTP traffic between the remote branches and the headquarters. The customer also wants the branches to communicate directly, thereby reducing traffic at the headquarters location. The solution most consider that the branch routers are limited in available memory. Which VPN solution meets these requirements?

   • ADMVPN Phase 2 Hub and Spoke design
   • BDMVPN Phase 3 Hub and Spoke design
   • CDMVPN Phase 3 Hierarchical design
   • DDMVPN Phase 1 Hub and Spoke design

   Show answer

   Answer: B

   Explanation

   I'm going wth B. DMVPN Phase 3 increases scalability of the network by minimizing the amount of routing information that the spokes need to maintain, thus greatly reducing the routing table overhead vs Phase 2...

   Source: Adapted from community discussion — jzzmth

   References

   • cisco.com documentation

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7. Question 67 · 359 in bank

   Which node performs the LISP Map-Server and Map-Resolver functions in the Cisco SD-Access network architecture?

   • Acontrol plane node
   • Bfabric edge node
   • Cborder node
   • Dintermediate node

   Show answer

   Answer: A

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8. Question 68 · 359 in bank

   Select 2

   A network engineer must design a multicast solution to prevent the spoofing of multicast streams and ensure efficient bandwidth utilization. The network will be merged with another multicast domain in the future, and the merge must require minimum effort. Which two solutions meet the customer requirements? (Choose two.)

   • APIM-SSM
   • BIGMPv3
   • CIGMPv2
   • DPIM-SM
   • EMSDP

   Show answer

   Answer: AB

   Explanation

   I too think it's A and B: "The ease of installation and operation of SSM makes it ideal for network operators, especially in those cases where content needs to be forwarded between multiple independent PIM domains (because there is no need to manage MSDP for SSM between PIM domains)." https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-ssm.html And without IGMPv3 you can't setup PIM-SSM

   Source: Adapted from community discussion — jzzmth

   References

   • Cisco documentation
   • Cisco documentation

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9. Question 69 · 359 in bank

   

   Refer to the exhibit. An engineer is designing a Layer 2 campus network. The design must support fast convergence and leverage as much bandwidth as possible between layers. Distribution switches do support VSS; unfortunately, not all routing protocols are available for use due to license limitations. Which solution must the engineer choose?

   • AEtherChannel
   • BMEC
   • CRSTP
   • DECMP

   Show answer

   Answer: B

   Explanation

   Multi-Chassis EtherChannel. With inter-chassis SSO, the total switchover time is within a second and when a chassis fails or during a switchover event, all the links on that chassis go down. External switches that are single-homed into the failed chassis experience an outage. It is recommended to dual-home all connections to the SV pair using MEC technology, which primarily load-balances traffic across links, and keeps the traffic impact minimal in the event of chassis or link failure.

   Source: Adapted from community discussion — mgiuseppe86

   References

   • Cisco documentation

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10. Question 70 · 359 in bank

    DRAG DROP - Drag and drop the elements from the left onto the protocols where they are used on the right. 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: See figure below

    

    Next question

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

300-420 practice, question 61. 359 questions available.