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When implementing MPLS VPNs between CE and PE routers, which

题目
单选题
When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? （）
A

If using IS-IS as the PE-CE routing protocol, no redistribution is required.

B

If using static routes between the CE and PE routers, no redistribution of other VPN routes is required.

C

If the PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required.

D

If RIP is the routing protocol that is used between the PE-CE routers, no redistribution is required, but any other protocol will require redistribution.

E

If using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistribution.

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相似问题和答案

第1题：

Which two mechanisms control route distribution between PE routers in a 2547bis VPN?()

A. site id

B. policies

C. circuit id

D. extended communities


参考答案：B, D

第2题：

If the OSPF protocol is used to connect customer edge （CE） routers to service provider edge（PE） routers in the VPN backbone， which two options best describe the use of SHAM links？（）

  • A、A sham-link is created between any twoo VPN sites that belong to the same OSPF area and share an OSPF backdoor link
  • B、A sham-link is seen as an intra-area link between PE routers，an OSPF adjacency is created and data base is exchanged
  • C、A SHAM link is created between two directly connected PE routers so that it is preferred over the low speed backdoor door
  • D、A SHAM link is part of OSPF network of MPLS-VPN provider

正确答案:A,B

第3题：

Which two routes do P routers see by default in a BGP MPLS VPN configuration? ()(Choose two.)

A. IGP routes advertised by P routers

B. IGP routes advertised by PE routers

C. VPN routes advertised by PE routers

D. VPN routes advertised by CE routers


参考答案：A, B

第4题：

Which four statements about the Carrier Supporting Carrier （CSC） feature are true？ （）

  • A、MPLS is required between the PE and CE routers that connect the backbone carrier to the customer carrier.
  • B、The backbone carrier must enable the PE router to check that the packets it receives from the CErouter contain only the labels that the PE router advertised to the CE router.
  • C、Every packet that crosses the backbone carrier must be encapsulated so that the packet includes MPLS labels
  • D、AII PE routers that link the backbone carrier to the customer carrier must run Route Target Rewrite.
  • E、Arouting protocol is required between the PE and CE routers that connect the backbone carrierto thecustomer carrier. The routing protocol enables the customer carrier to exchange IGP routing information with the backbone carrier.

正确答案:A,B,C,E

第5题：

Which statement is correct about an OSPF sham-link？（）

  • A、A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
  • B、A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
  • C、A sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.
  • D、A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
  • E、A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.

正确答案:B

第6题：

Which two of these are characteristics of MPLS VPNs?()

A. Layer 3 MPLS VPNs can forward only IP packets

B. Layer 2 MPLS VPNs can forward any network protocol

C. MPLS label paths are automatically formed based on Layer 2 frames

D. Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 frames

E. In Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies


参考答案：A, B

第7题：

What is a reason for implementing MPLS in a network？（）

  • A、MPLS eliminates the need of an IGP in the core.
  • B、MPLS reduces the required number of BGP-enabled devices in the core.
  • C、Reduces routing table lookup since only the MPLS core routers perform routing table lookups.
  • D、MPLS eliminates the need for fully meshed connections between BGP enabled devices.

正确答案:B

第8题：

Which type of VPN router is not required to run MPLS?()

A. Provider Core (P)

B. Provider Edge (PE)

C. Customer Edge (CE)

D. Customer Boundary (CB)


参考答案：C

第9题：

When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? As a Network Engineer, it is necessary for you to know how to implement MPLS VPNs between Customer Edge and Provider Edge routers. Refer to the following descriptions, which one is making sense?（）

  • A、If using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistribution
  • B、If using IS-IS as the PE-CE routing protocol, no redistribution is required
  • C、If using static routes between the CE and PE routers, no redistribution of other VPN routes is required
  • D、If PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required

正确答案:D

第10题：

When BGP is used as the PE-CE routing protocol, which of these statements is correct?（）

  • A、On the CE router, PE neighbors must be configured in the VRF context on the CE router
  • B、On PE routers, the CE IBGP neighbors are configured in the global BGP configuration
  • C、On PE routers, the CE EBGP neighbors are configured in the VRF context
  • D、A separate BGP process must be used on the PE routers for CE routers so that they do not use the same BGP routing process as that used for the PE router's other provider neighbors

正确答案:C

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