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单选题Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）A An Adjacency is formed.B No IS-IS PDUs are sentC An Adjacency does not form.D An Adjacency forms but traffic is not forwarded.

题目
单选题
Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）
A

An Adjacency is formed.

B

No IS-IS PDUs are sent

C

An Adjacency does not form.

D

An Adjacency forms but traffic is not forwarded.

参考答案和解析
正确答案： C
解析： 暂无解析
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相似问题和答案

第1题：

Two Level 2 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?()

A. An Adjacency is formed.

B. No IS-IS PDUs are sent.

C. An Adjacency does not form.

D. An Adjacency forms but traffic is not forwarded.


参考答案：A

第2题：

Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas. How many IS-IS adjacencies exist between the two routers?（）

A.0

B.1

C.2

D.3


参考答案：B

第3题：

Routers A and B are connected with a point-to-point OC-3 interface. Each router‘s OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in the same area.How many IS-IS adjacencies exist between the two routers?（）

A.0

B.1

C.2

D.3


参考答案：C

第4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5题：

Refer to the exhibit. On the basis of the configuration provided, how are the Hello packets sent by R2 handled by R5 in OSPF area 5?()

A. The Hello packets will be exchanged and adjacency will be established between routers R2 and R5.

B. The Hello packets will be exchanged but the routers R2 and R5 will become neighbors only.

C. The Hello packets will be dropped and no adjacency will be established between routers R2 and R5.

D. The Hello packets will be dropped but the routers R 2 and R5 will become neighbors.


参考答案：C

第6题：

Which two IS－IS hello values must match to form a Level 1 IS－IS adjacency? ()

A.AFI

B.Area

C.System id

D.N-Selector


参考答案：A, B

第7题：

Which of the following must match for two directly connected routers running OSPF to establish a neighbor adjacency?()

A. area IDs

B. process IDs

C. router IDs

D. hello timers


参考答案：A, D

第8题：

Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?()

A. An Adjacency is formed.

B. No IS-IS PDUs are sent

C. An Adjacency does not form.

D. An Adjacency forms but traffic is not forwarded.


参考答案：C

第9题：

Refer to the exhibit. OSPF is configured on all routers in the network. On the basis of the show ip ospf n eighbor output, what prevents R1 from establishing a full adjacency with R2? ()

A. Router R1 will only establish full adjacency with the DR and BDR on broadcast multi- access networks.

B. Router R2 has been elected as a DR for the broadcast multiaccess network in OSPF area 1.

C. Routers R1 and R2 are configured as stub routers for OSPF area 1 and OSPF area 2.

D. Router R1 and R2 are configured for a virtual link between OSPF area 1 and OSPF area 2.

E. The Hello parameters on routers R1 and R2 do not m atch.


参考答案：A

第10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

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