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What does the LSP Holdtime field in an IS-IS database indica

题目
单选题
What does the LSP Holdtime field in an IS-IS database indicate?（）
A

the LSP age

B

the LSP refresh interval

C

the LSP elapsed lifetime

D

the LSP remaining lifetime

参考答案和解析
正确答案： D
解析： 暂无解析
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相似问题和答案

第1题：

What is the default value of the IS－IS lsp－refresh－interval command?()

A. 60 seconds

B. 5 minutes

C. 15 minutes

D. 30 minutes


参考答案：C

第2题：

在IS-IS协议中（）用于识别一个LSP的新旧。

  • A、LSP序列号
  • B、LSP剩余生存时间
  • C、LSP ID
  • D、LSP的Source ID

正确答案:A

第3题：

Which of the following is not among the basic features of a relational database?

A．It does not matter what order the rows are in.

B．It does not matter what order the columns are in.

C．Different columns should have different column names.

D．Different columns should have different data types.


正确答案：D

第4题：

You have a Level 1-only router （Router A） in IS-IS area 49.0001. How does Router A learn how to get to IP prefixed in other areas？（）

  • A、Router A must have a Level 2 adjacency with the Level 1/Level 2 router in area 49.0001.
  • B、The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 2 LSP it floods into area 49.0001.
  • C、The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 1 link-state PDU （LSP） it floods into area 49.0001.
  • D、The Level 1/Level 2 router in area 49.0001 advertises these prefixed into area 49.0001 using a Level 2 LSP it floods into the area.

正确答案:C

第5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.

正确答案:C

第6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7题：

以下关于在IS-IS协议中广播链路的LSDB同步描述正确的是（）。

  • A、LSP通过组播形式进行泛洪
  • B、DIS周期性地发送CSNP报文
  • C、对于本地数据库中没有的或者更新的LSP信息，普通IS-IS路由器向DIS路由器发送PSNP报文请求需要的LSP
  • D、收到LSP后需要发送PSNP报文进行确认

正确答案:A,B,C

第8题：

IS-IS路由协议要产生新的LSP并扩散交换LSP的原因可能有()。

A.邻居邻接关系建立起来或down掉

B.运行IS-IS的接口up/down

C.引入的IP路由发生了变化

D.运行IS-IS的接口被赋予了新的IS-ISmetric


正确答案：ABC

第9题：

What does the LSP Holdtime field in an IS-IS database indicate?（）

  • A、the LSP age
  • B、the LSP refresh interval
  • C、the LSP elapsed lifetime
  • D、the LSP remaining lifetime

正确答案:D

第10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.

正确答案:A

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