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4A0-101 · Question #121
4A0-101 Question #121: Real Exam Question with Answer & Explanation
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Question
If two routers running IS-IS protocols are exchanging Hello packets with different authentication types, which of the following statements regarding the adjacency state established between them is true?
Options
- ADifferent authentication types are not possible because IS-IS only supports password
- BAn adjacency will not be formed
- CThe two routers negotiate the authentication type and then reach the up state.
- DOnly an L2 adjacency will form, as long as both routers are L2 capable.
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