4A0-103 Online Practice Questions and Answers

Click on the exhibit button below.

With fast reroute enabled, and given the following:

The protected LSP path is R1-R2-R3.

All links are of equal cost.

Which of the following statements is true? (Choose two)

A.

Router R1 is the LSP originator and is also a PLR.

B.

With one-to-one link or node protection, the detour LSP path is R1-R4-R5-R2-R3.

C.

With one-to-one link or node protection, the detour LSP path is R1-R4-R5-R3.

D.

If the R2-R3 link fails, router R3 becomes a PLR

E.

None of the nodes can be protected with FRR.

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.

Click on the exhibit button below:

Consider the following:

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Router R2 is an ABR in OSPF Areas 0 and 1.

-

Router R2 advertises the aggregate prefix 10.10.10.0/24 into Area 1.

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Router R1 in Area 0 generates LDP labels for FECs 10.10.102/31 and 10.10.10.4/31 Router R3 in Area 1 places these FECs in its LIB, but it does not place them in its LFIB. What can you do on router R3 to make it populate these labels in its LFIB?

A.

Disable route summarization on router R3

B.

Enable LDP aggregate prefix match

C.

Create an import policy to accept these FECs

D.

Disable LDP exact match on the specified FECs

An LSP path is configured as follows:

-Shared-explicit reservation style

-Make-before-break (MBB) enabled

-500Mpbs bandwidth reserved on a 1Gbps link

With 100Mbps of unreserved bandwidth remaining, the operator increases the LSP-path's bandwidth reservation to 900Mbps. What happens to the existing LSP?

A. CSPF looks for the delta bandwidth, taking down the first path if necessary.

B. CSPF looks for the delta bandwidth, implementing make-before-break.

C. After 5 failed attempts to find the bandwidth requested, the head end disables the LSP.

D. CSPF looks for the entire bandwidth requested, implementing MBB.

Which approach to LSP path diversity provides the most control, but the least flexibility?

A. Administrative Groups

B. Shared Risk Link Groups

C. Strict hop LSP paths

D. Fast reroute

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

A. 16

B. 20

C. 24

D. 25

E. 32

How does MPLS-TE overcome the issue of IP hyper-aggregation?

A. By enabling the creation of LSPs across alternate links to balance the network traffic.

B. By eliminating the requirement for core IP routing.

C. By not allowing more than one LSP to use a particular path.

D. By defining multiple LSPs across a network and implementing an IGP load balancing algorithm across them.

Which of the following about the Alcatel-Lucent 7750 SR command "own Isp-trace" is FALSE?

A. The MPLS TTL values are incremented at each request.

B. The router uses MPLS Echo Request packets that are IP-routed.

C. The router collects hop information along the tunnel's path.

D. The router performs an unidirectional LSP test.

Which of the following about MPLS shortcuts for IGP on an Alcatel-Lucent 7750 SR is FALSE?

A. An IGP route takes priority over a transport tunnel.

B. Both LDP and RSVP-TE based tunnels can be used.

C. MPLS tunnels can be used to resolve the prefixes learned via IGP.

D. Multiple MPLS tunnels can be installed in the FIB.

Click on the exhibit.

A fully loose LSP "toR6" is configured. All links have the same cost and all routers are Alcatel- Lucent 7750 SRs. The LSP currently traverses the path R1-R2-R7-R8-R4-R6 and the resignal timer is enabled. Which of the following about this LSP is FALSE?

A. The LSP will switchover to another path if a failure occurs.

B. The LSP will switchover to a better path as soon as it is available.

C. CSPF must be enabled for this LSP to attempt to find a better path.

D. The LSP will switchover to a better path in a MBB fashion.