Cisco CCNP Service Provider 350-501 Questions & Answers

• Question 441:

  You are writing an RPL script to accept routes only from certain autonomous systems. Consider this code:

  RP/0/RP0/CPU0:router(config-rpl)# if as-path in (ios-regex `.*77$')RP/0/RP0/CPU0:router(config-rpl-if)# passRP/0/RP0/CPU0:router(config-rpl-if)# endif

  If you apply this code to BGP filters, which effect does the code have on your router?

  A. denies routes from AS 7070

  B. allows routes from AS 7077

  C. denies routes from AS 7007

  D. allows routes from AS 770

  Correct Answer: B

• Question 442:

  Which regular expression query modifier function indicates the start of a string?

  A. +

  B. ^

  C. $

  D. [^]

  Correct Answer: B

• Question 443:

  Refer to the exhibit.

  

  An engineer is preparing to implement link aggregation configuration. Which statement about this configuration is true?

  A. The switch port negotiates an EtherChannel if it receives LACP packets from a connected peer running passive mode.

  B. The switch port actively sends packets to negotiate an EtherChannel using PAgP.

  C. The switch port passively negotiates an EtherChannel if it receives PAgP packets from a connected peer.

  D. The switch port accepts LACP and PAgP packets from a connected peer and negotiate an EtherChannel using the common EtherChannel mode.

  Correct Answer: B

  Reference: https://www.cisco.com/en/US/docs/switches/metro/me3600x_3800x/trash/swethchl.html

• Question 444:

  Which BGP attribute is used first when determining the best path?

  A. origin

  B. AS path

  C. local preference

  D. weight

  Correct Answer: D

• Question 445:

  Refer to the exhibit.

  

  An engineer wants to authenticate the OSPF neighbor between PE-A and PE-B using MD5.

  Which command on PE-B successfully completes the configuration?

  A. PE-B(config-if)#ip ospf message-digest-key 1 md5 44578611 PE-B(config-if)#ip ospf authentication null

  B. PE-B(config-if)#ip ospf message-digest-key 1 md5 44578611 PE-B(config-if)#ip ospf authentication key-chain 44578611

  C. PE-B(config-if)#ip ospf message-digest-key 1 md5 44568611 PE-B(config-if)#ip ospf authentication null

  D. PE-B(config-if)#ip ospf message-digest-key 1 md5 44578611

  PE-B(config-if)#ip ospf authentication message-digest

  Correct Answer: D

• Question 446:

  How much must the MTU be increased when configuring the 802.1q VLAN tag?

  A. 2 bytes

  B. 4 bytes

  C. 8 bytes

  D. 12 bytes

  Correct Answer: B

  Reference: https://www.cisco.com/c/en/us/support/docs/lan-switching/8021q/17056-741-4.html

• Question 447:

  Egress PE NAT is being used via a single centralized router to provide Internet access to L3VPN customers. Which description of the NAT operation is true?

  A. The NAT table contains a field to identify the inside VRF of a translation.

  B. Multiple address pools are needed for the same L3VPN because each site has a separate NAT.

  C. The different L3VPNs using the Internet access must not have IP overlaps internally.

  D. Users in different VRFs cannot share the same outside global IP address.

  Correct Answer: A

  Reference: https://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/112084-ios-nat-mpls-vpn-00.html

• Question 448:

  Refer to the exhibit.

  

  Which two statements about the IS-IS topology are true? (Choose two.)

  A. R1 and R4 are Level 2 neighbors.

  B. All four routers are operating as Level 1-2 routers.

  C. All four routers are operating as Level 2 routers only.

  D. All four routers are operating as Level 1 routers only.

  E. R1 and R2 are Level 2 neighbors.

  Correct Answer: BE

  default session IS-IS is L1-2, only R1 and R2 is neighbors, not directly neighbors R1 and R4

• Question 449:

  Refer to the exhibits.

  

  R1 and R2 are directly connected and IS-IS routing has been enabled between R1 and R2. R1 generates the above log message periodically. Based on this output, which statement is true?

  A. IS-IS neighbor authentication is failing for Level 2 PDUs only.

  B. IS-IS neighbor authentication is failing for Level 2 first and then for Level 1 PDUs.

  C. IS-IS neighbor authentication is failing for Level 1 and Level 2 PDUs.

  D. IS-IS neighbor authentication is failing for Level 1 PDUs only.

  Correct Answer: D

• Question 450:

  Refer to the exhibit.

  

  Assume all other configurations are correct and the network is otherwise operating normally. Which conclusion can you draw about the neighbor relationship between routers R1 and R2?

  A. The neighbor relationship is up.

  B. The neighbor relationship will be up only if the two devices have activated the correct neighbor relationships under the IPv4 address family.

  C. The neighbor is down because the local-as value for R2 is missing in the R1 neighbor statement.

  D. The neighbor relationship is down because R1 believes R2 is in AS 65012.

  Correct Answer: D