单选题Two Level 2 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）AAn Adjacency is formed.BNo IS-IS PDUs are sent.CAn Adjacency does not form.DAn Adjacency forms but traffic is not forwarded.
单选题
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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