4A0-C04 Online Practice Questions and Answers

Which of the following about CSPF is TRUE?

A. The tail-end router performs the CSPF calculation for an LSP.

B. CSPF calculations are always performed on RSVP-TE based LSPs.

C. The head-end router performs the CSPF calculation for an LSP.

D. Each downstream router performs its own CSPF calculation for an LSP.

Click on the exhibit.

Two LSPs traverse the path R1-R2-R3. Both LSPs are configured with facility fast reroute and link protection. When router R1 is the PLR, which router becomes the Merge Point (MP) for this LSP?

A. Router R1

B. Router R2

C. Router R3

D. Router R4

E. Router R5

Click on the exhibit button below:

Consider the following:

-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.

-

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

If the Nokia 7750 SR is rebooted after an "admin save'' has been performed, which of the following about mirror services is TRUE?

A. Only the mirror source must be re-configured.

B. Only the mirror destination must be re-configured.

C. Both the mirror destination and mirror source must be re-configured.

D. Neither the mirror destination nor the mirror source must be re-configured.

Click the exhibit button.

Routers R1 ,, R2, and R3 are running a classful routing protocol between them. Assuming that router R1 advertises all directly connected networks, how will these networks be represented in router R3's routing table?

A. Router R3's routing table can only contain one of the routes, which will result in route flapping.

B. Router R3's routing table will have one entry for 10.1.1.0/24 and one entry for 10.1.2.0/24.

C. The networks will be represented with one entry of 10.0.0.0/8 in router R3's routing table.

D. The networks will be represented with one entry of 10.0.0.0/24 in router R3's route table.

How does a DMP inform the downstream routers that it has merged detour tunnels?

A. The DMP sends the DMP_Object in each detour's PATH messages.

B. The DMP summarizes PATH messages, giving each detour its own MSGJD.

C. The DMP identifies itself as the previous hop in each detour's PATH message.

D. The DMP sends a single PATH message containing the merged DETOUR_Objects.

Refer to the exhibit.

Assume that OSPFv3 is properly configured on all routers and that R4 advertises its system prefix into Area 0. Which of the following statements best describes how R5 learns R4's IPv6 system prefix?

A. With a Router LSA originated by R1

B. With a Router LSA originated by R5

C. With a Router LSA originated by R4

D. With an Inter-Area Prefix LSA originated by R1

E. With an Inter-Area Prefix LSA originated by R5

F. With an Inter-Area Prefix LSA originated by R4

Which of the following statements is TRUE?

A. An OSPF adjacency can be established on an IES interface.

B. IES allows provider MP-BGP sessions to be extended to customers.

C. An IES service must use static routes in order to communicate with customer networks.

D. An IES interface supports OSPF and IS-IS in passive mode only.

Which of the following about IS-IS Traffic Engineering on an Nokia 7750 SR is FALSE?

A. Traffic engineering information is carried in the extended TLVs.

B. Traffic engineering must be enabled on all IP/MPLS routers along the LSP path.

C. Traffic engineering information is stored in the opaque database,

D. Traffic engineering is required for constraint-based LSPs.

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

A. "client1" routes will be tagged with communities "North" and "West".

B. "client1" routes will be tagged with community "West".

C. "client1" routes will be tagged with community "North".

D. "client1" routes will be rejected.