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2021 Oct route 642-902 official certification guide:

Q181. When an IPv6 enabled host boots, it sends a router solicitation (RS) message. An IPv6 router responds with a router advertisement (RA). Which two items are contained in the RA? (Choose two.)

A. IPv6 address for the host

B. lifetime of the prefix

C. prefixes for the link

D. keepalive timers

E. request for the local host IP address

F. any route advertisements it has received

Answer: BC


Q182. Refer to the exhibit.

Router RTR is attempting to establish BGP neighbor relationships with routers RT1 and RT3. On the basis of the information that is presented in the exhibit, which two statements are true? (Choose two)

A. RTR has a BGP password set but neighbor 10.0.0.1 does not

B. RTR has a BGP password set but neighbor 10.0.0.5 does not

C. RTR has a BGP password set but neighbor 10.0.0.1 has an incorrect password set

D. RTR has a BGP password set but neighbor 10.0.0.5 has an incorrect password set

E. Neighbor 10.0.0.1 has a BGP password set but RTR does not

F. Neighbor 10.0.0.5 has a BGP password set but RTR does not

Answer: AD


Q183. IPv6 host wants to communicate with IPv4 host, what will occur?

         NAT-PT IPv4 address pool: 10.21.8.1 - 10.21.8.10

Select the best response.

A. router will determine IPv4 address

B. host itself has IPv6-IPv4 mapping

C. IPv6 host can use DNS server to find out IPv4 address

D. ICMP can be used to discover right address

Answer: A


Q184. Which of the following NSAP addresses is a private, locally administered address? Select the best response.

A. 39.0f01.0002.0000.0c00.1111.00

B. 48.0f01.0002.0000.0c00.1111.00

C. 49.0004.30ac.0000.3090.c7df.00

D. 52.0f01.0002.0000.0c00.1111.00

Answer: C


Q185. Which BGP attribute is used by BGP to prevent routing loops? Select the best response.

A. AS-path

B. next-hop

C. MED

D. weight

E. local preference

F. origin

Answer: A


Renewal ccnp 642-902 labs:

Q186. What technique should be used on BGP edge routers to prevent a multi-homed autonomous system from becoming a transit system?

A. Advertise with a high MED value all networks that are discovered via external BGP.

B. Set the no-export community attribute on all networks that are advertised externally.

C. Remove the AS-Path information on all routes in the BGP table prior to advertising externally.

D. Set the origin code to incomplete for all networks that are discovered via external BGP.

E. Only advertise networks externally if they have been discovered via internal BGP.

F. Use an outgoing distribution list to filter all networks not originating from inside the autonomous system.

Answer: F


Q187.  

Answer:


Q188. Which option is true regarding the synchronization rule?

A. Do not use or internally advertise a route until the route is learned from a source other than BGP.

B. Do not use or advertise a route until the route is learned from a BGP peer.

C. Do not use or advertise routes marked PARTIAL.

D. Wait until a CONFIRM message is received before using routes from BGP neighbors.

Answer: A


Q189. Which BGP option is required when load sharing over multiple equal-bandwidth parallel links from a single CE router to a single ISP router over eBGP? Select the best response.

A. eBGP Multipath

B. eBGP Multihop

C. BGP Synchronization

D. Public AS numbers

Answer: B


Q190. Above is the output from show ip bgp neighbors command.

What is line 21 stating about the BGP connection?

A. the number of neighbors that the router has

B. the number of times the router has established a TCP connection

C. the number of consecutive TCP connections to the specified remote neighbor

D. the number of total TCP connections that the router has

Answer: B