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多选题Which two statements are correct regarding IS-IS？（）ARouters maintain a single link-state database per area.BRouters maintain a separate Level 1 link-state database.CRouters maintain a separate Level 2 link-state database.DRouters maintain a single Leve

题目
多选题
Which two statements are correct regarding IS-IS？（）
A

Routers maintain a single link-state database per area.

B

Routers maintain a separate Level 1 link-state database.

C

Routers maintain a separate Level 2 link-state database.

D

Routers maintain a single Level 1 link-state database per area.

参考答案和解析
正确答案： B,D
解析： 暂无解析
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相似问题和答案

第1题：

Which two statements are correct regarding IS－IS?()

A. Routers maintain a single link-state database per area.

B. Routers maintain a separate Level 1 link-state database.

C. Routers maintain a separate Level 2 link-state database.

D. Routers maintain a single Level 1 link-state database across multiple areas.


参考答案：B, C

第2题：

Which two statements about the IS －IS routing protocol are true?()

A. IS - IS is capable of supporting IPv4 and IPv6.

B. IS - IS is only capable of supporting IPv4 and CLNS.

C. IS - IS routers use ES - IS hellos (ESH) to establish and to maintain neighbor relationships.

D. IS - IS routers run the Bellman - Ford algorithm against their LSDBs to pick the best paths.

E. Level 1 routers learn about paths within the area of which they are a part.

F. Level 2 routers learn about paths both within areas and between areas.


参考答案：A, E

第3题：

In order to help the new employees to maintain a high level of motivation and build up confidence ，a well-planed program is necessary.()


正确答案：对

第4题：

Which two are characteristics of link-state routing protocols?（） (Choose two.)

  • A、Routers choose a best path for a destination based on the SPF algorithm.
  • B、All routers in a given area or level build a consistent database describing the network's topology.
  • C、Routers choose the best path for a destination based on the interface on which they received the link stateadvertisement with the lowest cost.
  • D、All routers in a given area or level forward link state advertisements between interfaces in the same area or level, adding their metric to the link state advertisement's cost information when they forward it.

正确答案:A,B

第5题：

What information does a router running a link－state protocol use to build and maintain its topological database?()

A. hello packets

B. SAP messages sent by other routers

C. LSAs from other routers

D. beacons received on point-to-point links

E. routing tables received from other link-state routers

F. TTL packets from designated routers


参考答案：A, C

第6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 prefixes 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 1 link-state PDU (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 2 LSP it floods into area 49.0001.

D. The Level 1/Level 2 router in area 49.0001 advertises these prefixes into area 49.0001 using a Level 2 LSP it floods into the area.


参考答案：B

第7题：

What kind of information does a router running a link－state routing protocol need to create and maintain its topological database?()

A. LSAs from other routers

B. Beacons received on point-to-point links

C. hello packets

D. Routing tables received from neighbors

E. SAP packets sent by other routers

F. TTL packets from exclusive routers


参考答案：A, C

第8题：

What is the purpose of IS－IS level boundaries?()

A. Restrain the formation of adjacencies.

B. Control the flooding scope of link-state PDUs.

C. Partition the L2 backbone into multiple domains.

D. Aggregate L1 domains into a contiguous backbone.


参考答案：B

第9题：

You are working on an Oracle Database 10g database. You enabled the Flashback Database feature. Which two statements regarding flashback logs are true？ （）

  • A、 Flashback logs are not archived.
  • B、 Flashback logs are maintained in redo log files.
  • C、 Flashback logs are maintained in the Flash Recovery Area.
  • D、 Flashback logs are used to maintain Flashback Database related errors.
  • E、 Flashback logs need to be cleared manually after you disable Flashback Database.

正确答案:A,C

第10题：

如果OSPF链路故障，哪个包广播网络的变化（）

  • A、Link-state advertisement
  • B、Database Description
  • C、Link-state request
  • D、Link-state update

正确答案:D

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