Juniper Juniper Certifications JN0-643 Questions & Answers

• Question 231:

  Which two statements are correct about L2PT? (Choose two.)

  A. L2PT requires 802.1Q tunneling enablement to effectively tunnel L2 protocols.

  B. 802.1Q tunnels all L2 protocols by default.

  C. L2PT encapsulates L2 PDUs by enabling the ingress switch to rewrite the PDUs' source MAC addresses before forwarding them onto the service provider network.

  D. You cannot enable L2PT and VLAN translation on the same VLAN.

  Correct Answer: AD

• Question 232:

  When enabling MVRP for dynamic VLAN registration, which three timers would be configured on an interface? (Choose three.)

  A. hello-interval

  B. join-timer

  C. leave-timer

  D. max-age

  E. leaveall-timer

  Correct Answer: BCE

• Question 233:

  -- Exhibit

  

  -- Exhibit -

  Click the Exhibit button.

  Referring to the configuration shown in the exhibit, which statement is true?

  A. RP2 stops sending all SA messages to its peer.

  B. RP1 stops sending all SA messages to its peer.

  C. RP2 stops sending SA messages for the group 224.7.7.7 from source 192.168.100.10 to RP1.

  D. RP1 stops sending SA messages for the group 224.7.7.7 from source 192.168.100.10 to RP2.

  Correct Answer: C

• Question 234:

  Your company asks you to configure multicast routing on a Junos device. They tell you that the router at IP address 192.168.1.4 is the root of the shared multicast delivery tree.

  Which command allows you to configure the Junos device as a non-RP router for PIM?

  A. set protocols pim rp local family inet disable

  B. set protocols pim rp local address 192.168.1.4

  C. set protocols pim rp static address 192.168.1.4

  D. set protocols pim rp auto-rp announce

  Correct Answer: C

• Question 235:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Your company has PIM running on some critical routers in your network, but another engineer has requested that you configure a PIM policy to prevent R2 from becoming a PIM neighbor of R1 by dropping the hello packets.

  Referring to the exhibit, which three commands are necessary for preventing R2 from becoming a PIM neighbor of R1? (Choose three.)

  A. set protocols pim interface ge-0/0/1.0 neighbor-policy block-pim

  B. set policy-options policy-statement block-pim term 1 from route-filter 227.2.2.2/32 exact

  C. set policy-options policy-statement block-pim term 1 from route-filter 10.10.10.2/32 exact

  D. set policy-options policy-statement block-pim term 1 then reject

  E. set policy-options policy-statement block-pim term 1 from route-filter 10.10.10.1/32 exact

  Correct Answer: ACD

• Question 236:

  Which multicast group is used for all PIM routers?

  A. 224.0.0.22

  B. 224.0.0.13

  C. 224.0.0.1

  D. 224.0.0.2

  Correct Answer: B

• Question 237:

  You are configuring PIM-SM for your network, and want to use a statically configured RP.

  What are two ways to accomplish this task? (Choose two.)

  A. [edit protocols pim] uesr@router# show rp { static { address 10.10.10. ; } } interface ge-0/0/0.0 { mode sparse; } interface ge-0/0/5.0 { mode sparse; } interface lo0.0 { mode sparse; }

  B. [edit protocols pim] user@router# show rp { local { address 223.0.0.1; } } interface ge-0/0/0.0; interface ge-0/0/5.0; interface lo0.0;

  C. [edit protocols pim] user@router# show rp { static { address 10.10.10. { group-ranges { 224.0.0.0/4; } } } } interface all { mode sparse; }

  D. [edit protocols pim] user@router# show rp { local { address 10.10.10. ; group-ranges { 233.0.0.0/8; } } } interface ge-0/0/0.0 { version 1; } interface ge-0/0/5.0 { version 1; } interface lo0.0 { version 1; }

  Correct Answer: BD

• Question 238:

  -- Exhibit -- Exhibit -

  

  Click the Exhibit button.

  Referring to the exhibit, USER1 wants to only receive multicast traffic for group 225.0.0.1 and USER2 wants to only receive multicast traffic for group 225.0.0.2. Both users are connected to an EX Series switch and are receiving unwanted multicast traffic.

  What will resolve the problem?

  A. Create IGMP static groups with the exclude parameter.

  B. Enable the IGMP immediate-leave parameter.

  C. Use PIM sparse mode instead of PIM dense mode.

  D. Enable IGMP snooping.

  Correct Answer: D

• Question 239:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Referring to the exhibit, the RPs are set up for anycast. Multicast traffic is currently flowing from the source to the receivers.

  Which statement is true when RP2 goes down?

  A. Multicast traffic is interrupted for receiver 2 until RP2 recovers.

  B. Receiver 2 needs to rejoin RP1.

  C. Multicast traffic flows uninterrupted.

  D. RP1 starts sending multicast traffic to receiver 2.

  Correct Answer: C

• Question 240:

  Which two statements are true about MSDP mesh groups? (Choose two.)

  A. The MSDP mesh group was originally designed to limit SA flooding.

  B. SA messages received from a mesh group member flood these messages to all peers that are not members of this mesh group.

  C. SA messages received from a peer not in any mesh group do not flood to all peers.

  D. SA messages received from a peer not in any mesh group perform a peer-RPF check and, if successful, flood to all peers (except the advertising router).

  Correct Answer: AB