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
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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