Cisco CCNP Service Provider 300-510 Questions & Answers

• Question 21:

  While configuring Cisco NSF awareness, a network engineer enters the bgp graceful-restart command after the BGP session is established in a router that runs IOS XE Software. Graceful restart capabilities are not exchanged. Which two actions should be taken? (Choose two.)

  A. Reload the router

  B. Verify that BGP route dampening is configured

  C. Reduce BGP convergence time

  D. Issue the clear ip bgp * command

  E. Issue the show ip bgp neighbors command.

  Correct Answer: AD

  Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-16/irg-xe-16-book/bgp-nonstop-forwarding-awareness.html

• Question 22:

  Refer to the exhibit.

  

  Customer traffic from the branch site to the hub is experiencing packet drops. The engineer verified that:

  1.

  Customer traffic from the hub is able to reach the branch site.

  2.

  The connection between PE1 and PE2 is working normally.

  3.

  Routers P1 and P2 are able to ping devices on the hub site. Which action resolves the issue?

  A. Redistribute the CE1 OSPF routes in the PE1 VRF.

  B. Redistribute the CE2 OSPF routes in the PE2 VRF.

  C. Advertise the VPNv4 routes of the branch site in CE2.

  D. Advertise the VPNv4 routes of the hub in CE1.

  Correct Answer: D

• Question 23:

  Which difference must an engineer consider when choosing whether to implement OSPF or IS-IS as the routing protocol on the network?

  A. The OSPF DR election process is deterministic, and the IS-IS DS election process is not deterministic.

  B. To support fast convergence, OSPF uses the LSA arrival timer and IS-IS uses the PRC-interval timer.

  C. IS-IS supports ordinary, stub, totally-stub, and NSSA areas, but OSPF supports only stub areas.

  D. IS-IS links are associated with either a Level 1 area or a Level 2 area at one time, but OSPF links are associated with multiple areas at one time.

  Correct Answer: B

  Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/15-s/irs-15-s-book/irs-fscnt.html

• Question 24:

  Refer to the exhibit.

  

  After configuring IS-IS on routers R1 and R2, an engineer notices that only the loopback interface at 2000:1::1 /96 is known to router R2. Which change must be made so that only Loopback2 is advertised from R1 to R2?

  A. Configure the router isis area1 command under the Loopback0 interface on R1.

  B. Remove the advertise passive-only command under the IS-IS address family ipv6 configuration

  C. Remove the ipv6 router isis area1 command under the Loopback2 interface on R1.

  D. Remove the passive-interface Loopback0 command under the router isis area1 configuration.

  Correct Answer: C

• Question 25:

  Refer to the exhibit.

  

  A network engineer has divided AS into confederations. Due to repeated ASN, when the 10.0 0.0/8 prefix from R1 arrives to R2, BGP automatically rejects it. What should the engineer do to fix the problem so that BGP allows that prefix on R2?

  A. Configure the command as-override on R1.

  B. Configure the command allowas-in on R2.

  C. Configure the command allowas-in on all the PE routers.

  D. Configure the command as-override on R2.

  Correct Answer: B

  Reference: https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/112236-allowas-in-bgp-config-example.html

• Question 26:

  A network operator working for a telecommunication company with an employee id: 4074:92:707 is planning to implement the Nonstop Forwarding (NSR) feature on the customer's core network. After getting the configuration ready for NSR. on which router should the operator implement NSR changes?

  A. on the CE router

  B. on the ASBR router

  C. on the ABR router

  D. on the PE router

  Correct Answer: D

  Reference: https://www.cisco.com/en/US/technologies/tk869/tk769/technologies_white_paper0900aecd801dc5e2.html

• Question 27:

  When deploying a nationwide network of routers, what is the benefit of using BGP confederations?

  A. availability

  B. scalability

  C. security

  D. automatability

  Correct Answer: B

  Reference: https://www.routerfreak.com/bgp-network-design-bgp-confederation/

• Question 28:

  What are two features of dual-stack? (Choose two.)

  A. It is implemented without excessive processing power.

  B. It supports IPv4 and IPv6 traffic on the same infrastructure.

  C. It allows an engineer to stack multiple Layer 2 switches to serve as a single switching unit.

  D. It requires tunneling IPv6 traffic over an IPv4 infrastructure.

  E. It securely routes and tunnels traffic between separate sites over the Internet.

  Correct Answer: AB

• Question 29:

  Refer to the exhibit.

  

  An engineer working on a client's network is trying to solve the BGP community issue on R1 and R2 routers. After displaying the BGP entries, the engineer notices that both routers still have different outputs. Which action must the engineer perform to any of the routers to correct the problem and get the same output?

  A. Execute the lp bgp-community new-format command in Router1.

  B. Remove the lp bgp-community new-format command in Router1.

  C. Advertise the route to Router2 as standard community.

  D. Advertise the route to Router2 as extended community.

  Correct Answer: A

  Reference: https://www.noction.com/blog/understanding-bgp-communities

• Question 30:

  Refer to the exhibit.

  

  The extension header of the IPv6 header is ignored when which value is equal to zero?

  A. Segments Left

  B. Hdr Ext Len

  C. Routing Type

  D. Next Header

  Correct Answer: D

  Reference: https://www.ciscopress.com/articles/article.asp?p=31948