Nokia Nokia Certifications 4A0-C01 Questions & Answers

• Question 271:

  Which of the following commands is used in an RSVP signaled MPLS tunnel to validate the path MTU based on signaling across the LSP?

  A. Path MTU is always calculated from the MTU of the egress network port on the head end PE.

  B. oam sdp-mtu

  C. adspec

  D. cspf

  Correct Answer: C

• Question 272:

  Which of the following devices inspects the MPLS header in the received packet, and exchanges it for a new MPLS header?

  A. iLER

  B. LER

  C. LSR

  D. PE

  E. eLER

  Correct Answer: C

• Question 273:

  Click on the exhibit button below.

  

  Which of the following is the correct configuration on 6VPE1 for a BGP peering session with CE1?

  A. PE1>config>service>vpm>bgp#info --------------------------------------------------- group "toCE1" family ipv6 export "mbgp-bgp" neighbor 2001:db8:12::1 peer-as 64497 exit exit

  B. PE1>config>service>vpm>bgp#info --------------------------------------------------- group "toCE1" family ipv6 export "mbgp-bgp" neighbor 2001:db8:12:1 peer-as 64496 exit exit

  C. PE1>config>router>bgp#info --------------------------------------------------- group "toCEl" family ipv6 export "mbgp-bgp" neighbor 2001 db8:12::1 peer-as 64497 exit exit

  D. PE1>config>router>bgp#info --------------------------------------------------- group "toCE1" family ipv6 export "mbgp-bgp" neighbor 2001:db8:12::1 peer-as 64496 exit exit

  Correct Answer: A

• Question 274:

  SAPs in an Epipe service can only be configured on Ethernet ports

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 275:

  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.

  Correct Answer: C

• Question 276:

  Click on the exhibit.

  

  An LSP traverses the path R1-R2-R3-R6 and facility fast reroute is enabled. If the protected LSP carries one transport label and one service label, how many labels will be on the bypass tunnel if router R2 fails?

  A. 1

  B. 2

  C. 3

  D. 4

  Correct Answer: C

• Question 277:

  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.

  Correct Answer: C

• Question 278:

  Which of the following about CAC is FALSE?

  A. CAC is used when the LSP path has not been computed by CSPF.

  B. CAC is used when the LSP path has been computed by CSPF.

  C. CAC is used to perform a bandwidth check on each egress interface of the downstream router.

  D. CAC is used to perform a bandwidth check based on the router's LSDB.

  Correct Answer: D

• Question 279:

  Which MPLS mode saves only active label mappings received from peer LSRs?

  A. Conservative label retention

  B. Liberal label retention

  C. Downstream on demand

  D. Downstream unsolicited

  Correct Answer: A

• Question 280:

  Click on the exhibit.

  

  An LDP tunnel is established on R1-R2-R4-R6 because the link between routers R3 and R6 is down. With the LDP-IGP Sync feature enabled, what happens immediately after the link is restored?

  A. A new LDP session is established on R1-R3-R6 as soon as the FIB is updated.

  B. The LDP session remains unchanged until the existing path R1-R2-R4-R6 goes down.

  C. A new LDP session is established on R1-R3-R6 as soon as router R1 receives a new label for router R6.

  D. The LDP session remains unchanged until router R3 stops advertising the maximum metric for the link to router R6.

  Correct Answer: D