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…

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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.

• A
  15% (4)
• B
  78% (21)
• C
  4% (1)
• D
  4% (1)

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