300-415 practice questions 321–330

1. Question 321 · 382 in bank

   A network administrator is configuring a tunnel interface on a branch Cisco IOS XE router to run TLOC extensions. Which configuration will extend a TLOC over a GRE tunnel to another router in the branch? A.

   

   B.

   

   C.

   

   D.

   

   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

   Reference: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/command/sdwan-cr-book/sdwan-cr-book_chapter_010.html#wp2314758100

   Source: Adapted from community discussion — Speirsington

   References

   • Cisco documentation
   • Cisco documentation
   • Cisco documentation

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2. Question 322 · 382 in bank

   Which feature builds transport redundancy by using the cross link between two redundant WAN Edge routers?

   • ATLOC extension
   • Bquality of service
   • Czero-touch provisioning
   • DOMP

   Show answer

   Answer: A

   Explanation

   Reference: https://www.cisco.com/c/dam/en/us/solutions/collateral/enterprise-networks/sd-wan/nb-06-cisco-sd-wan-ebook-cte-en.pdf page 26

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3. Question 323 · 382 in bank

   In a Cisco SD-WAN architecture, what is the role of the WAN Edge?

   • AIt provides orchestration to assist automatic provisioning of WAN Edge routers and overlay
   • BIt is the management plane responsible for centralized configuration and monitoring
   • CIt is the control plane that builds and maintains network topology
   • DIt is the data plane that is responsible for forwarding traffic

   Show answer

   Answer: D

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4. Question 324 · 382 in bank

   Which TCP Optimization feature is used by WAN Edge to prevent unnecessary retransmissions and large initial TCP window sizes to maximize throughput and achieve a better quality?

   • ASACK
   • BSEQ
   • CRTT
   • DSYN

   Show answer

   Answer: A

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5. Question 325 · 382 in bank

   A network administrator is configuring VRRP to avoid a traffic black hole when the transport side of the network is down on the primary device. What must be configured to get the fastest failover to standby?

   • AOMP tracking
   • Bhigher group ID number
   • Cprefix-list tracking
   • Dlower timer interval

   Show answer

   Answer: C

   Explanation

   Correct answer is C: Track both the OMP session and a list of remote prefixes. list-name is the name of a prefix list configured with the policy lists prefix-list command on the vEdge router: vEdge(config-vrrp)# track-prefix-list list-name If all OMP sessions are lost, VRRP failover occurs as described for the track-omp option. In addition, if reachability to all the prefixes in the list is lost, VRRP failover occurs immediately, without waiting for the OMP hold timer to expire, thus minimizing the amount of overlay traffic is dropped while the vEdge routers determine the VRRP master.

   Source: Adapted from community discussion — MasterALX

   References

   • cisco.com documentation

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6. Question 326 · 382 in bank

   A network administrator is tasked to make sure that an OMP peer session is closed after missing three consecutive keepalive messages in 3 minutes. Additionally, route updates must be sent every minute. If a WAN Edge router becomes unavailable, the peer must use last known information to forward packets for 12 hours. Which set of configuration commands accomplishes this task? A.

   

   B.

   

   C.

   

   D.

   

   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

   Reference: https://sdwan-docs.cisco.com/Product_Documentation/Software_Features/SD-WAN_Release_16.2/03Routing/02Configuring_OMP

   Next question

7. Question 327 · 382 in bank

   A network administrator is bringing up one WAN Edge router for branch connectivity. Which types of tunnels form when the WAN edge router connects to the Cisco SD-WAN fabric?

   • ADTLS or TLS tunnel with vSmart controller and IPsec tunnel with vBond controller
   • BDTLS or TLS tunnel with vBond controller and IPsec tunnel with vManage controller
   • CDTLS or TLS tunnel with vBond controller and IPsec tunnel with other WAN Edge routers
   • DDTLS or TLS tunnel with vSmart controller and IPsec tunnel with other WAN Edge routers

   Show answer

   Answer: D

   Explanation

   D is the correct answer. 1. VBOND will make only DTLS connection, TLS connection will not happen between vBond and vEdge. 2. vBond connection is temporary 3. vEdges will make IPSec tunnels over data plane

   Source: Adapted from community discussion — HAMPI

   References

   • Cisco documentation
   • cisco.com documentation

   Next question

8. Question 328 · 382 in bank

   Which policy blocks TLOCs from remotes and allows TLOCs from the data center to form hub-and-spoke peering?

   • Acentralized data policy
   • Blocalized control policy
   • Ccentralized control policy
   • Dlocalized data policy

   Show answer

   Answer: C

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9. Question 329 · 382 in bank

   Which plane assists in the automatic onboarding of the SD-WAN routers into the SD-WAN overlay?

   • Adata
   • Borchestration
   • Cmanagement
   • Dcontrol

   Show answer

   Answer: B

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10. Question 330 · 382 in bank

    Which component is responsible for routing protocols such as BGP and OSPF in a Cisco SD-WAN solution?

    • AvSmart Controller
    • BWAN Edge Router
    • CvManage
    • DvBond Orchestrator

    Show answer

    Answer: B

    Explanation

    WAN Edge router - This device, available as either a hardware appliance or software-based router, sits at a physical site or in the cloud and provides secure data plane connectivity among the sites over one or more WAN transports. It is responsible for traffic forwarding, security, encryption, quality of service (QoS), routing protocols such as Border Gateway Protocol (BGP) and Open Shortest Path First (OSPF), and more.

    Source: Adapted from community discussion — kentkyye

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300-415 practice, question 321. 382 questions available.