Juniper Juniper Certifications JN0-660 Questions & Answers

• Question 41:

  You are asked to configure auto-RP as part of a new PIM sparse mode deployment in your network. Which two configuration tasks are required? (Choose two.)

  A. All RP routers must be configured with the mapping auto-RP role.

  B. All RP routers must be configured with the discovery auto-RP role.

  C. All non-RP routers must be configured with the mapping auto-RP role.

  D. All non-RP routers must be configured with the discovery auto-RP role.

  Correct Answer: AD

• Question 42:

  You have configured PIM dense mode on your network. One of your PIM-enabled routers is not in the path of the source-based tree between the source and the receivers, and has no need for the multicast traffic. Which behavior would you expect from that router?

  A. The router will send register stop messages to the RP.

  B. The router will send prune messages to its upstream router.

  C. The router will send assert messages to the RP.

  D. The router will send graft messages to its upstream router.

  Correct Answer: B

• Question 43:

  You have established an MSDP peering between multicast domains for your AS and a neighboring AS. You are concerned about unnecessary flooding or looping of source active messages between MSDP peers. Which MSDP mechanism is used to prevent this problem?

  A. The receiving MSDP peer performs a multicast RPF check to ensure that the SA messages are forwarded away from only the originating multicast source.

  B. The receiving MSDP peer sends register-stop messages towards the originating RP that forwarded the SA messages.

  C. The receiving MSDP peer performs amulticast peer-RPF check to ensure that the SA messages are forwarded away from only the originating RP.

  D. The receiving MSDP peer sends prune messages to all upstream neighbors to avoid receiving additional SA messages.

  Correct Answer: C

• Question 44:

  You have recently configured an aggregated Ethernet interface between two devices in your network. The member links do not all reside within the same PFE complex. You must ensure that the bandwidth and burst size defined in a policer applied to this aggregated Ethernet interface are properly enforced when the traffic falls out of profile.

  Which configuration parameter should you use?

  A. committed-information-rate

  B. committed-burst-size

  C. shared-bandwidth-policer

  D. physical-interface-policer

  Correct Answer: C

• Question 45:

  Refer to the exhibit.

  

  Referring to the applied drop profile shown in the exhibit, if the buffer is 30 percent full, what is the probability of traffic being dropped?

  A. 25 percent

  B. 30 percent

  C. 50 percent

  D. 75 percent

  Correct Answer: A

• Question 46:

  Refer to the exhibit.

  

  Your network engineer reported that they lost BGP connectivity to the neighbor 192.163.6.4 one hour ago, for five to ten minutes.

  What are two ways to determine what happened? (Choose two.)

  A. Run the show bgp neighbor orf 192.163.6.4 detail command.

  B. View the information on the BGP monitoring station at 192.168.44.100.

  C. Run the show log bgptrace command and search for the time of the lost connectivity.

  D. Run the show log messages command and search for the time of the lost connectivity.

  Correct Answer: BD

• Question 47:

  Which action is required for BGP confederations to function?

  A. Remove the well-known private AS numbers.

  B. Change the maximum number of times an AS can be in an AS path.

  C. Replace the neighbor AS number with the local AS number.

  D. Set the confederation autonomous system to include private AS number(s).

  Correct Answer: D

• Question 48:

  Given the following regular expression:

  .* 14203+(21870110458)

  Which two AS paths match? (Choose two.)

  A. 27522 2187010458

  B. 27522 14203 14203 14203 21870

  C. 14203 21780 10458

  D. 14203 21780 27522

  Correct Answer: BC

• Question 49:

  Given the following regular expression: (14203121870)

  Which two AS paths will match? (Choose two.)

  A. 1045814203

  B. 21870

  C. 10458 21870 21870

  D. 27522 14203 21870

  Correct Answer: AB

• Question 50:

  Which authentication method secures IS-IS hello, link-state, and sequence number PDUs?

  A. Level authentication

  B. Interface authentication

  C. Area authentication

  D. Domain authentication

  Correct Answer: A