Multiple choice

Refer to the exhibit. This is the debug output from 2 directly connected EIGRP routers. They are not forming an adjacency. What is the cause?

  1. One router is a non-cisco router

  2. They have different autonomous-system numbers

  3. They are using difference sequence numbers

  4. They are sending incorrect hello types
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

EIGRP routers form adjacencies only with neighbors in the same autonomous system (AS). Different AS numbers will cause routers to ignore each other's hello packets, preventing adjacency formation. The debug output shows mismatched AS values, which is a definitive adjacency failure cause.

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