4A0-103 Online Practice Questions and Answers

Which of the following prerequisites must you configure on a router to enable LDP-over-RSVP support? (Choose two)

A. Configure the T-LDP peers for tunneling.

B. Configure tunneled T-LDP sessions between PE routers.

C. Enable Idp-over-rsvp in the IGP configuration on the PEs and ABRs

D. Enable LSP stitching on the RSVP LSPs

Which of the following LDP messages are used in the successful establishment of LDP sessions? Choose three answers

A. Label request message

B. Notification message

C. Address message

D. Keepalive message

E. Initialization message

F. Hello message

The destination IP address of a received unlabeled packet is successfully matched in the FIB. Which of the following is FALSE?

A. A POP label stack operation may be performed.

B. The outgoing interface and next-hop address will be determined from the FIB.

C. The packet can be forwarded as a labeled or unlabeled packet.

D. A PUSH label stack operation may be performed.

What action does a router perform when it looks up the label of an incoming packet in its LFIB and sees that the LFIB maps to an egress label of 3?

A. It requests a new label from the peer that provided this label.

B. It pops the label.

C. It pushes an additional label onto the label stack.

D. It signals a new label to the peer that sent the packet.

Which of the following about the RSVP-TE Hello protocol is FALSE?

A. The Hello protocol can speed up convergence without reducing refresh time.

B. Hello messages are sent after at least one RSVP session is active on the interface.

C. An interface with multiple RSVP sessions sends Hello messages for each session.

D. An RSVP neighbor is declared down if Hello messages are not received within the Hello timeout.

Click on the exhibit.

All links have 1 Gbps unreserved bandwidth initially. After the LSP's primary and standby secondary paths are signaled, how much bandwidth is reserved on the link between routers R1 and R2?

A. If Shared Explicit reservation style is used, 400Mbps is reserved.

B. If Shared Explicit reservation style is used, 700Mbps is reserved.

C. If Fixed Filter reservation style is used, 400Mbps is reserved.

D. If Fixed Filter reservation style is used, 300Mbps is reserved.

What are the default settings for RSVP-TE on the Alcatel-Lucent 7750 SR?

A. Per-interface label space, liberal retention mode

B. Per-platform label space; liberal retention mode

C. Per-interface label space, conservative retention mode

D. Per-platform label space, conservative retention mode

Which of the following about label modes on the Alcatel-Lucent 7750 SR is FALSE?

A. RSVP uses downstream on demand label distribution mode.

B. LDP uses conservative label retention mode.

C. LDP advertises label mappings to all peers for which it might be a next-hop for a given FEC.

D. RSVP distributes a label mapping for a FEC when it has been requested to do so.

Click on the exhibit. After the Isp-ping command is executed, which of the following best describe the router's action?

A. MPLS Echo Request packets are sent within the RSVP-TE tunnel that is signaled for "lsp- toR2".

B. MPLS Echo Request packets are sent within the LDP tunnel that is signaled for Mlsp-toR2".

C. MPLS Echo Request packets are IP-routed to the destination address of "lsp-toR2".

D. MPLS Echo Request packets are sent to the destination address of "lsp-toR2" over TCP.

Click on the exhibit.

The LSP "toR6" is configured with a fully strict path on an Alcatel-Lucent 7750 SR. Which of the following configurations is required to enable fast reroute for this LSP?

A. Enable fast-reroute on all routers along the path. R1, R2, R4, and R6.

B. Enable both link-protection and node-protection on router R1.

C. Enable fast-reroute with either one-to-one or facility mode on this LSP.

D. Enable link-protection only on router R4.