Alcatel-Lucent Alcatel-Lucent Certifications 4A0-105 Questions & Answers

• Question 141:

  If the command "disable-learning" has been added at the VPLS level, then MAC entries which have already been learned will not be aged.

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 142:

  What is the default fdb size for a VPLS service?

  A. 100

  B. 1

  C. 25

  D. 250

  Correct Answer: D

• Question 143:

  Click on the exhibit below.

  

  The VPLS service MTU on R2 is 1514 bytes. What must the service MTU be on all other routers participating in the VPLS?

  A. The service MTU must be equal to or smaller than 1514 bytes.

  B. The service MTU must be 1514 bytes.

  C. The service MTU must be equal to or greater than 1514 bytes.

  D. The service MTU can be any value.

  Correct Answer: B

• Question 144:

  What is the default service-mtu for a VPLS service?

  A. 1500

  B. 1514

  C. 1518

  D. It depends on the access port MTU.

  E. It depends on the network port MTU.

  Correct Answer: B

• Question 145:

  Click on the exhibit below.

  

  If the SDP between R2 and R1 goes down, what devices will be reachable from R2 through the VPLS?

  A. Only R4 will be reachable through the VPLS.

  B. All devices will be reachable through the VPLS.

  C. R4 and R3 will remain reachable.

  D. No devices will be reachable.

  Correct Answer: A

• Question 146:

  Click on the exhibit below.

  

  The following VPLS services and SAPs have been configured. Which of the following statements is true?

  A. All untagged frames will be dropped.

  B. The source MAC address of a frame with a top tag of 200 and bottom tag of 300 will be populated in VPLS 3.

  C. All frames with more than one tag will be dropped.

  D. The source MAC address of a frame with a single tag of 500 will be populated in VPLS 1.

  E. The source MAC address of a frame with a top tag of 100 will be populated in VPLS 2.

  Correct Answer: E

• Question 147:

  Which of the following statements is false?

  A. VPLS is a bridged LAN service.

  B. VPLS provides L2 VPN services to CEs.

  C. VPLS is a point-to-point service where CEs are presented with point-to-point virtual circuits.

  D. CEs that are members of the same VPLS service instance communicate with each other as if they are connected via a bridged LAN.

  Correct Answer: C

• Question 148:

  Click on the exhibit below.

  

  Assume the port on CE-A is sending two tags, a top tag of 100 and a bottom tag of 500. PE-A is configured with a SAP id of 1/1/1:100.*. How should PE-B be configured if CE-B is expecting a top tag of 200 and a bottom tag of 500?

  A. PE-B will require a SAP id of "sap 1/1/1:500*".

  B. PE-B will require a SAP id of "sap 1/1/1:100*".

  C. PE-B will require a SAP id of "sap 1/1/1:500.200".

  D. PE-B will require a SAP id of "sap 1/1/1:200*".

  Correct Answer: D

• Question 149:

  Which of the following statements relating to VPLS is false?

  A. A VPLS is a multipoint Layer 2 service.

  B. A VPLS allows multiple customer sites to be connected in a single bridged domain.

  C. A VPLS on a single node requires a SDP.

  D. With an IP/MPLS infrastructure, service providers can provide multiple VPLS services over a common IP/MPLS infrastructure.

  E. The VPLS switches traffic based on MAC address associated to the appropriate SAP.

  Correct Answer: C

• Question 150:

  Port 1/1/1 has been configured as an access port with QinQ encapsulation. Which of the following three statements are true for ingress traffic assuming default configuration? (Choose 3)

  A. sap 1/1/1:*.0 is a valid sap id.

  B. sap 1/1/1:100* will accept frames with a single tag of 100.

  C. sap 1/1/1:200* will strip the top tag of 200 and the bottom tag will be transparently passed.

  D. sap 1/1/1:0* will accept all untagged frames.

  E. sap 1/1/1:0* will accept any tagged frames.

  Correct Answer: BCD