题目内容（请给出正确答案）

[主观题]

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.

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更多“Two Level 1 routers are exchan…”相关的问题

第1题

Routers A and B are connected with a point-to-point OC-3 interface. Each router‘s OC-3 int

erface 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

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第2题

Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 inte

rface 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

点击查看答案

第3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.

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第4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.

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第5题

Which two statements are true about IS - IS？（）

A.Interfaces have a default metric of 1.

B.Level 1 is intra - area and level 2 is interarea.

C.Level 1 routing is between an end system (ES) and IS while Level 2 routing is between an IS and IS.

D. Hosts send ISHs while routers send ESHs.

E. IS - IS is an open standard.

F. Metrics depend on interface speed.

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第6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.

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第7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.

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第8题

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

A. An Adjacency forms.

B. An Adjacency does not form.

C. An Adjacency forms but traffic is not forwarded.

D. No IS-IS PDUs are sent.

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第9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.

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第10题

You are running OSPF between two ERX Edge Routers across an OC-12c link with HDLC encapsulation.How many designated routers are present for this link？（）

A.0

B.1

C.2

D.3

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