Nokia Nokia Certifications 4A0-106 Questions & Answers

• Question 181:

  After configuring OSPF as the PE to CE routing protocol for a VPRN service you get the following output from an Alcatel-Lucent 7750 SR: What is most likely wrong with the configuration?

  

  A. OSPF is not configured on the CE router

  B. There is a problem with OSPF authentication

  C. The operational MTU does not match

  D. The PE and CE router have different OSPF interface types configured

  E. None of the above

  Correct Answer: C

• Question 182:

  When configuring a VPRN service on an Alcatel-Lucent 7750 SR, where should the following policy be applied?

  

  A. On the CE under the RIP context

  B. On the PE under the BGP context

  C. On the PE under the RIP context

  D. On the CE under the BGP context

  E. This policy is not required

  Correct Answer: E

• Question 183:

  In a VPRN, what type of logical topology is required for the BGP sessions configured in the provider core?

  

  A. Full mesh between all CE, PE and P devices

  B. Full mesh between PE and P devices

  C. Full mesh of P devices

  D. Full mesh of PE devices

  E. Full mesh between PE and CE devices

  Correct Answer: D

• Question 184:

  Where are VPN-IPv4 addresses used in a VPRN?

  A. In the routing updates exchanged from CE to PE

  B. In the routing updates exchanged from PE to PE

  C. In the routing updates exchanged from P to PE

  D. In customer packets as they traverse the provider core

  E. In all route tables of the VPRN control plane

  Correct Answer: B

• Question 185:

  How was standard BGP modified to allow it to carry routing information for VPRNs?

  A. By using the MED attribute to carry the OSPF metric.

  B. By defining Extended Communities for use as the Route Target

  C. By using the Cluster List attribute to carry the network prefix

  D. By defining support for the VPN-IPv4 address family

  E. By adding an additional field to the BGP Update to carry the VPRN label

  Correct Answer: D

• Question 186:

  What is the purpose of the Route Distinguisher?

  A. It defines the VPN membership

  B. It defines which routes are imported into the vrf

  C. It defines which routes are exported from the vrf

  D. It is used to make IPv4 addresses unique

  E. It is used as the VPN label

  Correct Answer: D

• Question 187:

  VPN-IPv4 addressing is made unique by defining an address structure consisting of:

  A. A 32 bit IPv4 address followed by a 64 bit Route Target

  B. A 32 bit IPv4 address followed by a 64 bit Route Distinguisher

  C. A 64 bit Route Target followed by a 32 bit IPv4 address

  D. A 64 bit Route Distinguisher followed by a 32 bit IPv4 address

  E. A 32 bit Route Distinguisher followed by a 32 bit IPv4 address FA 32 bit Route Target followed by a 32 bit IPv4 address

  Correct Answer: D

• Question 188:

  Which of the following describes how a route is handled when is received at the PE from the local CE?

  A. It will be placed into the customer VRF and automatically propagated into the BGP table

  B. It will be placed into the customer VRF and then be propagated to the BGP table only if BGP is used as the PE-CE protocol

  C. It will be placed into the customer VRF and require an export policy to be propagated to the BGP table

  D. It will be placed into the customer VRF and require an export policy to be propagated to the BGP table if RIP is used as the PE-CE protocol

  E. It will be placed into the customer VRF and require an export policy to be placed into the BGP table if a protocol other than BGP is used as the PE-CE protocol

  Correct Answer: A

• Question 189:

  At what point does the Route Target become associated with a route?

  A. When the route is first received at the P from the PE

  B. When the route from the CE is populated into the VRF at the PE

  C. When the route from the PE is populated into the VRF at the CE

  D. When the route is propagated from the PE to the CE

  E. When the route is exported into the MP-BGP table from the VRF

  Correct Answer: E

• Question 190:

  In a provider core consisting of 6 PE and 4 P routers, what is the minimum number of BGP sessions required in total for correct operation of VPRN services?

  A. 0

  B. 5

  C. 10

  D. 15

  E. 45

  Correct Answer: D