Question 1

Which of the following regarding label population is TRUE?

Options :

A : Selected labels from the FIB are populated to the LFIB.

B : Selected labels from the RIB are populated to the FIB.

C : Selected labels from the LIB are populated to the FIB.

D : Selected labels from the LIB are populated to the LFIB.

Answer: D

Question 2

Which of the following is a function of the control plane in an MPLS router?

Options :

A : Label swapping

B : Pushing a label on an unlabeled packet

C : Label allocation

D : Routing lookups

Answer: C

Question 3

Using facility mode fast reroute, how does the PLR learn the address of the MP?

Options :

A : The PLR issues an RSVP PATH message to the tail-end requesting the address of the MP.

B : The PLR learns the address of the MP from the ERO

C : The PLR learns the address of the MP from the RRO.

D : The PLR learns the address of the MP from the targeted RSVP Hello message.

E : The PLR knows the address of the MP is the same as the tail-end router.

Answer: C

Question 4

Which of the following is TRUE when the explicit null is implemented?

Options :

A : The penultimate router will forward packets to the eLER, based on the IP header.

B : The eLER will receive packets with a top label value of 0.

C : The eLER will receive packets with a top label value of 3.

D : The penultimate router will pop the top label from the packets.

Answer: B

Question 5

Click on the exhibit. 4-A0-103-page112-image36 Initially, all links along the path R1-R2-R4-R6 have 400Mbps unreserved bandwidth and all links along the pathR1-R3-R5-R6 have 800Mbps unreserved bandwidth. Shared Explicit reservation style is used and MakeBefore-Break is enabled. Both fully loose LSPs have been signaled as shown. Later, the configured bandwidthfor LSP-1 is changed to 400Mbps. Which of the following is TRUE?

Options :

A : After a new path for LSP-1 is established on R1-R3-R5-R6, the old path is torn down.

B : After the old path for LSP-1 is torn down, the new path is established on R1-R3-R5-R6.

C : LSP-1 will stay on R1-R2-R4-R6 because there is enough bandwidth on the existing path.

D : LSP-1 will be torn down because CSPF fails to find a new path.

Answer: C

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