Nokia Nokia Certifications 4A0-105 Questions & Answers

• Question 51:

  What is the MTU impact on the SDP path-mtu if fast reroute, one-to-one mode is implemented on the LSP?

  A. There will be no impact on the path-mtu.

  B. The path-mtu will decrease by4 bytes.

  C. The path-mtu will increase by 4 bytes.

  D. The path-mtu will decrease by 8 bytes.

  E. The path-mtu will increase by 8 bytes.

  Correct Answer: A

• Question 52:

  Click on the exhibit below.

  

  The SAP on PE-A has been configured with dot1q encapsulation. The SAP on PE-B has been configured with qinq encapsulation. CE-A sends frames with a single tag of 100. The VLAN tag from CE-A must be passed transparently. CE-B is expecting a frame with a top tag of 200 and bottom tag of 100. Which of the following is the correct SAP id for PE-B?

  A. sap 1/1/1:200.100

  B. sap 1/1/1:200*

  C. sap 1/1/1:*

  D. sap 1/1/1:0*

  Correct Answer: B

• Question 53:

  Which of the following SAP encapsulations supports only one service on a port?

  A. Dot1Q

  B. Null

  C. Q-in-Q

  D. Ipcp

  E. BCP

  Correct Answer: B

• Question 54:

  A customer has requested a VPLS service. The customer is using dot1q encapsulation and they have requested that all vlan tags be transparently passed. Which two SAP IDs will accept VLAN tags and pass them transparently? (Choose 2)

  A. sap 1/1/1

  B. sap 1/1/1:0*

  C. sap 1/1/1:0

  D. sap 1/1/1:*

  Correct Answer: AD

• Question 55:

  Click on the exhibit below.

  

  Which SDP on R3 will MAC addresses be associated with for devices behind R2?

  A. It depends if traffic is received via R4 or R1 from devices behind R2.

  B. The devices cannot communicate based on the configuration in the diagram so there will be no mac address association.

  C. Devices behind R2 will be associated with the sdp between R3 and R1.

  D. Devices behind R2 will be associated with the sdp between R3 and R4.

  Correct Answer: C

• Question 56:

  Click on the exhibit below.

  

  Assume a CE router is connected to the SAP of each PE. The arp cache of all CE routers is empty and the FDB for VPLS 300 is empty. The CE router connected to PE-A initiates a ping towards the CE router connected to PE-C. The ping is successful. Which of the following statements are true? (Choose 2)

  A. The FDB on PE-A will contain entries for all CE routers.

  B. The FDB on PE-B will contain an entry for the CE router connected to PE-A.

  C. The FDB on PE-B will contain an entry for all CE routers.

  D. The FDB on PE-C will contain entries for the CE router connected to PE-A and the CE router connected to PE-C.

  Correct Answer: BD

• Question 57:

  Which of the following describes the overhead added to a customer frame on an Ethernet link in a VPLS service on the Alcatel-Lucent 7750 SR?

  A. The overhead consists of 26 bytes. 14 DLC + 2 Ethertype + 8 for mpls labels + 2 for GRE

  B. The overhead consists of 14 bytes for DLC.

  C. The overhead consists of 18 bytes. 14 DLC +4 for mpls labels

  D. The overhead consists of 22 bytes. 14 DLC + 8 for mpls labels

  Correct Answer: D

• Question 58:

  You are providing a customer two VPLS services in two different Metro networks. VPLS 500 has been configured in Metro 1 and VPLS 900 has been configured in Metro 2. The customer has requested that they have connectivity between the Metro Networks with their existing VPLS services. Which configuration on the PE routers linking the metro networks will allow for VPLS 500 and VPLS 900 to act as a single VPLS service? Assume default values for all VPLS parameters and SDP 999 exists between the metro networks.

  

  A.

  

  B. C. D.

  Correct Answer: A

• Question 59:

  Click on the exhibit below.

  

  Given the following output what is the most likely reason the SDP binding is operationally down? (Choose 2)

  A. The sdp id is different on the far-end.

  B. LDP is disabled on the far-end.

  C. The vc-id is different on the far-end.

  D. The mesh-sdp is missing on the far-end.

  E. The mesh-sdp is administratively shutdown on PEL

  F. There is an MTU mismatch.

  Correct Answer: CD

• Question 60:

  Which of the following statements regarding unicastand multicast frames is true for a traditional layer 2 switch? (Choose 2)

  A. Multicast frames only forward out ports that have a known receiver.

  B. Unicast frames only forward out ports that have a known receiver.

  C. If the FDB is empty, unicast and multicast frames are treated equally.

  D. If the FDB has an entry for the unicast frame, both unicastand multicast are treated equally.

  Correct Answer: BC