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2021 Nov 4A0-103 pdf exam
Q11. Which of the following are functions of the MPLS control plane in a router?
(Choose two)
A. Label allocation and management.
B. Label swapping.
C. Pushing a label on an unlabeled packet.
D. Label signaling.
E. Routing lookups.
Answer: A,D
Q12. Click on the exhibit button below.
Given the configuration below, what is the system ID of the destination node?
A. 10.32.1.2
B. 10.1.478
C. 1048.1.1
D. Cannot tell from this configuration
E. 10.1.2.2
Answer: B
Q13. What is the significance of receiving a packet with the bottom MPLS label S bit set to 1?
A. It results in forwarding based on the next packet header.
B. It indicates that the label is the bottom of the MPLS label stack.
C. It indicates that the label is the top of the MPLS label stack.
D. Any LSR that receives an S bit set to 1 must discard the packet.
Answer: B
Q14. Click on the exhibit button below.
Assuming that LSP R1-R2-R3 requests the default fast reroute configuration, which router becomes a DMP for the detour tunnels?
A. Router R1
B. Router R2
C. Router R3
D. Router R4
E. Router R5
Answer: E
Q15. Assume that, on the Alcatel-Lucent 7750 SR, an LSP is configured with one-to-one FRR and node protection. Which of the following statements are FALSE? (Choose two)
A. Each PLR signals a detour LSP that avoids the downstream node. If the downstream node
cannot be avoided, a detour LSP that avoids the downstream link is signaled.
B. The detour LSP can take one or more hops before merging back on the protected LSP.
C. The merge point of the protected LSP must be the next-next-hop node
D. The ingress router will set the local protection desired flag in the session attribute object of the path message to inform all routers along the protected LSP path to establish detour LSPs.
E. The label recording desired flag must be set in the session attribute object in order for the PLR to know what label to swap when using the detour LSP.
Answer: C,E
Up to the immediate present 4A0-103 actual exam:
Q16. Which of the following are the default settings for the Alcatel-Lucent 7750 SR when using LDP?
A. Ordered control mode; downstream on demand.
B. Ordered control mode; downstream unsolicited.
C. Independent control mode; downstream on demand.
D. Independent control mode; downstream unsolicited.
Answer: B
Q17. Which of the following statements regarding LDP-over-RSVP are true? (Choose two)
A. Targeted sessions must exist between all routers in the tunnel's path.
B. Each LDP interface must be configured to support LDP tunneling.
C. LDP prefixes resolve to an RSVP LSP, rather than to a physical egress interface.
D. RSVP LSPs must exist between each PE-ABR pair, or ABR-ABR pair in each area.
Answer: C,D
Q18. What is the function of the MPLS label assigned to a packet?
A. It identifies the FEC.
B. It specifies the packet's header length
C. It identifies the origin of the packet.
D. It specifies the type of data contained in the packet
Answer: A
Q19. Which default LDP parameter are you able to change with CLI?
A. Label space mode
B. Label retention
C. Control mode
D. Keepalive factor
Answer: D
26. Which of the following are characteristics of an LSP? (Choose two)
A. It is unidirectional.
B. It is bidirectional.
C. It must always have a secondary path.
D. It provides a specific tunnel for a FEC through the network.
E. It always follows the IGP best path.
Answer: A,D
Q20. Click on the exhibit button below.
Consider the following:
- Routers R1 and R4 are in Area 1.
- Routers R4 and R5 in Area 0.
- Routers R5 and R3 are in Area 2.
To support LDP-over-RSVP tunnels between routers R1 and R3 over path R1-R4-R5-R3, with which routers will router R5 require targeted sessions? (Choose two)
A. Router R1
B. Router R4
C. Router R2
D. Router R3
Answer: B,D