CMS专题

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： A
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：

What kind of packets does OSPF send to keep up connectivity with its neighboring routers?（）

  • A、SPF packets
  • B、hello packets
  • C、keepalive packets
  • D、dead interval packets
  • E、LSU packets

正确答案: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 statements are true by default of a multilevel IS－IS network?()

A. Level 1 only routers see routes contained in their area.

B. Level 1 routers route towards Level 2 routers due to the attached bit.

C. Level 2 routers route towards Level 1 routers due to the attached bit.

D. Level 2 routers can see routes in other Level 2 areas and routes originated in Level 1 areas.


参考答案：A, D

第7题：

IS － IS creates and maintains adjacencies and neighbor relations by using the Hello protocol. For the following options, which are Hello packets used in IS － IS?()

A. A generic Hello

B. Point - to - point Level 1, point - to -point Level 2, LAN Level 1, LAN Level 2

C. Point - to - point Level 1, point - to - point Level 2, LAN

D. Point - to - point, LAN Level 1, LAN Level 2


参考答案：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：

What kind of packets does OSPF send to keep up connectivity with its neighboring routers?()

A. SPF packets

B. hello packets

C. keepalive packets

D. dead interval packets

E. LSU packets


参考答案：B

第10题：

What are two benefits of control plane policing？（）

  • A、protection against denial of service （DoS） attacks at infrastructure routers and switches
  • B、 protection against known worm attacks in routers and switches
  • C、quality of service （QoS） control for packets that are sourced from the data plane of Cisco routers and switches
  • D、quality of service control （QoS） for packets that are destined to the control plane of Cisco routers and switches
  • E、quality of service （QoS） control for packets that are destined to the data plane of Cisco routers and switches

正确答案:A,D

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