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Q49. 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 

Answer: B 


Q50. Which one of the following statements regarding RSVP LSP configuration is true? 

A. LSPs must always terminate on a system ID. 

B. MPLS and RSVP must be enabled on all routers. 

C. Interfaces must be individually created in RSVP. 

D. Path definitions must include at least one hop entry. 

Answer: B 


Q51. What is the common usage of the MPLS EXP bits? 

A. Each implementation can use them as they see fit. 

B. They are used to carry the Ethertype value. 

C. They are used to carry the TTL value. 

D. They are used to carry QoS classification. 

E. They are used to carry fragmentation flag information 

Answer: D 


Q52. Which of the following indicates the path over which an LSP's tail end router will return an RSVP RESV message? 

A. The IGP FIB. 

B. The Reservation State Block (RSB) 

C. The Path State Block (PSB) 

D. The opaque database. 

Answer: C 


Q53. Click on the exhibit button below. Assume the following: 

-Each router's OSPF interfaces are in the areas shown. 

- Bidirectional LDP-over-RSVP tunnels extend from routers R1 to R3 and back over the path R1- R4-R5-R3. 

- You enable fast reroute facility bypass on the R5-R3 RSVP LSP. 

- Router R5 acts as a PLR, protecting the R5-R3 link by building a bypass tunnel through router R2. 

You build a layer 2 VPN on routers R1 and R3, using the LDP-over-RSVP tunnels. What MPLS configuration step must you complete on router R2 for it to protect the end-to-end service? 

A. Enable LDP on the R2-R5 interface. 

B. Configure T-LDP sessions between routers R2 and R5 and R3. 

C. Configure LDP-over-RSVP support on router R2. 

D. Enable MPLS and RSVP on the router R2 network interfaces. 

E. Enable LDP on the R2-R5 and R2-R3 interfaces. 

Answer: D 


Q54. 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 

Answer: A,C 


Q55. Which of the following conditions must a router meet for an LSP path's RSVP session to exist? Choose two answers 

A. The router must build the Path State Block (PSB). 

B. The router must build the Reservation State Block (RSB). 

C. The router must build the Session State Block (SSB) 

D. The router must send the second RESV refresh message. 

E. The router must receive the second PATH refresh message. 

Answer: A,B 


Q56. In MPLS, how is the label range 0 ?15 used? 

A. Static LSPs 

B. Reserved use 

C. Vendor proprietary use 

D. Management LSPs 

E. Dynamic LSPs 

Answer: B