4A0-103 Online Practice Questions and Answers

Which of the following statements best describe MPLS fast reroute characteristics? (Choose two)

A. Fast reroute requires you to manually define detour paths.

B. Fast reroute provides path protection close to the failure point

C. Fast reroute performs automatic path calculation and signaling.

D. Fast reroute protects both primary and secondary paths.

How many bits of the MPLS header are used for the label field?

A. 16

B. 20

C. 24

D. 25

E. 32

Click on the exhibit button below.

If the four LSPs shown use the shared-explicit reservation style, how much bandwidth does CSPF request across a single 1Gbps link?

A. 100Mbps

B. 200Mbps

C. 300Mpbs

D. 600Mbps

E. 700Mbps

Which of the following can be used for label signaling and distribution on the Alcatel-Lucent 7750 SR? Choose two answers

A. RSVP-TE

B. TDP

C. LDP

D. ADP

E. MPLS-TE

Click on the exhibit button below.

Consider the output shown; why is the label in bold font not in use?

A. The router cannot do a SWAP of this label.

B. The label does not match the egress label for the same FEC.

C. The label is for a FEC for which the next-hop is the peer router

D. The label was signaled in error.

Click on the exhibit.

Initially, all links along the path R1-R2-R4-R6 have 400Mbps unreserved bandwidth and all links along the path R1-R3-R5-R6 have 800Mbps unreserved bandwidth. Shared Explicit reservation style is used and Make-Before-Break is enabled. Both fully loose LSPs have been signaled as shown. Later, the configured bandwidth for LSP-1 is changed to 400Mbps. Which of the following is TRUE?

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.

Which of the following describes constraint-based routing?

A. A mechanism that implements opaque LSAs.

B. A mechanism that computes routes based on specified requirements.

C. A mechanism that ensures the IGP best route is used.

D. A mechanism that enables LDP signaling to use a route other than the IGP best route.

Which of the following modes are used by RSVP-TE on an Alcatel-Lucent 7750 SR?

A. Independent control mode, downstream on demand

B. Independent control mode, downstream unsolicited

C. Ordered control mode, downstream on demand

D. Ordered control mode, downstream unsolicited

Click on the exhibit.

The link between routers R4 and R6 are configured with an admin group "red". What happens when the LSP is first signaled?

A. The LSP will go through the path R1-R2-R4-R6.

B. The LSP will go through the path R1-R3-R5-R6.

C. The LSP is down because router R1 detects that no path can meet its constraints.

D. The LSP is down because router R4 detects that no path can meet its constraints.

Click on the exhibit.

An LSP path is established on router R1 toward router R6. If there is a problem on router R4, but the link between R2 and R4 remains up, which of the following will affect the failure detection time?

A. The time router R2 takes to receive a PATH Error message from router R4.

B. The time router R2 takes to find out a number of RSVP Hello messages have been missed.

C. The time router R2 takes to send a PATH Tear message to the head-end router.

D. The time router R2 takes to receive a PATH message from router R4 after a PATH refresh interval.