Cisco CCNP Enterprise 300-420 Questions & Answers

• Question 231:

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

  A. Overlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network architecture.

  B. Overlay tunnels should only be considered as a transition technique toward a permanent solution.

  C. Overlay tunnels can be configured only between border devices and require only the IPv6 protocol stack.

  D. Overlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.

  Correct Answer: B

  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-ip4-gre-tunls-xe.pdf

  "The 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."

• Question 232:

  Which QoS feature responds to network congestion by dropping lower priority packets?

  A. CBWFQ

  B. tail drop

  C. WRED

  D. strict priority

  Correct Answer: C

• Question 233:

  Which two BGP features will result in successful route exchanges between eBGP neighbors sharing the same AS number? (Choose two.)

  A. advertise-best-external

  B. bestpath as-path ignore

  C. client-to-client reflection

  D. as-override

  E. allow-as-in

  Correct Answer: DE

• Question 234:

  A company is running BGP on a single router, which has two connections to the same ISP. Which BGP feature ensures traffic is load balanced across the two links to the ISP?

  A. Multihop

  B. Multipath Load Sharing

  C. Next-Hop Address Tracking

  D. AS-Path Prepending

  Correct Answer: B

• Question 235:

  Which nonproprietary mechanism can be used to automate rendezvous point distribution in a large PIM domain?

  A. Embedded RP

  B. BSR

  C. Auto-RP

  D. Static RP

  Correct Answer: B

• Question 236:

  What is a benefit of using VRRPv3 as compared to VRRPv2?

  A. VRRPv3 supports IPv4 and IPv6

  B. VRRPv3 supports authentication

  C. VRRPv3 supports preemption

  D. VRRPv3 supports stateful switchover

  Correct Answer: A

• Question 237:

  A customer is discussing QoS requirements with a network consultant. The customer has specified that endto-end path verification is a requirement. Which QoS solution meets this requirement?

  A. IntServ model with RSVP to support the traffic flows

  B. DiffServ model with PHB to support the traffic flows

  C. marking traffic at the access layer with DSCP to support the traffic flows

  D. marking traffic at the access layer with CoS to support the traffic flows

  Correct Answer: A

• Question 238:

  An enterprise customer has these requirements:

  1.

  end-to-end QoS for the business-critical applications and VoIP services based on CoS marking.

  2.

  flexibility to offer services such as IPv6 and multicast without any reliance on the service provider.

  3.

  support for full-mesh connectivity at Layer 2.

  Which WAN connectivity option meets these requirements?

  A. VPWS

  B. MPLS VPN

  C. DMVPN

  D. VPLS

  Correct Answer: D

• Question 239:

  Which solution allows overlay VNs to communicate with each other in an SD-WAN Architecture?

  A. External fusion routers can be used to map VNs to VRFs and selectively route traffic between VRFs.

  B. GRE tunneling can be configured between fabric edges to connect one VN to another.

  C. SGTs can be used to permit traffic from one VN to another.

  D. Route leaking can be used on the fabric border nodes to inject routes from one VN to another.

  Correct Answer: A

• Question 240:

  How do IETF, OpenConfig, and Cisco native YANG models differ when used to configure the same feature on an infrastructure device?

  A. OpenConfig models are more comprehensive than IETF.

  B. IETF models are more comprehensive than OpenConfig.

  C. Cisco native models are less comprehensive than QpenConfig.

  D. Cisco native models are less comprehensive than IETF.

  Correct Answer: A