Nokia Nokia Certifications 4A0-100 Questions & Answers

• Question 171:

  From the CE perspective, how does a VPLS operate?

  A. A VPLS operates as if 2 sites are directly connected by a single cable.

  B. A VPLS operates as if multiple sites are connected through a single switched LAN.

  C. A VPLS operates as if multiple sites are connected through a single router.

  D. A VPLS operates as if multiple sites are connected through a series of private point-to-point routed connections.

  Correct Answer: B

• Question 172:

  In regards to the Nokia 7750 SR-12 router, how many of the front access card slots are dedicated for Control Processors?

  A. 1

  B. 2

  C. 7

  D. 10

  Correct Answer: B

• Question 173:

  Which of the following best describes the function of the service label?

  A. Customer traffic is encapsulated with a service label by the ingress PE. The service label identifies which transport tunnel to use.

  B. Customer traffic is encapsulated with a service label by the egress PE. The service label identifies which transport tunnel to use.

  C. Customer traffic is encapsulated with a service label by the egress PE. The service label identifies the specific service the data belongs to.

  D. Customer traffic is encapsulated with a service label by the ingress PE. The service label identifies the specific service the data belongs to.

  Correct Answer: D

• Question 174:

  What does a VPLS solution look like from a customers perspective?

  A. To the customer, it appears as if all sites are directly connected by a single cable.

  B. To the customer, it appears as if all sites are connected through a single switched LAN.

  C. To the customer, it appears as if all sites are connected through a single router.

  D. To the customer, it appears as if all sites are connected through a series of private point-to-point connections.

  Correct Answer: B

• Question 175:

  If a customer requires a multipoint layer 2 VPN service between three or more locations which VPN service is best suited for this customer?

  A. Virtual Private Wire Service

  B. Virtual Private LAN Service

  C. Virtual Private Routed Networks

  D. Virtual Private Dark Fibre Service

  Correct Answer: B

• Question 176:

  Which of the following statements is FALSE when describing a Virtual Private LAN Service?

  A. A VPLS emulates a virtual switch or bridge.

  B. The VPLS performs MAC learning on MAC addresses seen from SAPs and SDPs.

  C. When a VPLS receives a frame with an unknown MAC destination, the frame will be dropped.

  D. MAC address forwarding database (FDB) is maintained for each VPLS.

  Correct Answer: C

• Question 177:

  If a customer requires a point-to-point layer 2 VPN service between two locations which VPN service would be typically suited for this customer?

  A. Virtual Private Wire Service .

  B. Virtual Private LAN Service.

  C. Virtual Private Routed Networks.

  D. Virtual Private Dark Fiber Service.

  Correct Answer: A

• Question 178:

  A VPWS service maintains a MAC Forwarding Database (FDB) for Ethernet SAPs.

  A. True

  B. False

  Correct Answer: B

• Question 179:

  Which of the following mediums can be used in a VPWS when defining SAPs (Select three)?

  A. Ethernet.

  B. ATM.

  C. Frame Relay.

  D. Token Ring.

  Correct Answer: ABC

• Question 180:

  How does a VPRN service avoid the problem of overlapping IP addresses from different customers?

  A. You cannot have overlapping IP addresses. Customers must change their IP address assignment.

  B. Each VPRN service maintains a separate VPN routing and forwarding instance to separate customer routing information. This allows for overlapping addresses.

  C. A VPRN ignores IP addressing information and uses MAC addressing instead, which are always unique.

  D. A VPRN translates customer IP addresses to a private addressing scheme administered by the service provider.

  Correct Answer: B