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4A0-C01 · Question #127

What causes an adjacency to change from down to two ways?

The correct answer is B. When a router receives a Hello packet that contains its own router ID in the neighbor list from a neighbor. See the full explanation below for the reasoning.

Question

What causes an adjacency to change from down to two ways?

Options

  • AWhen a link state update is received in response to a link state request.
  • BWhen a router receives a Hello packet that contains its own router ID in the neighbor list from a neighbor.
  • CWhen a router receives a database description packet from a neighbor.
  • DWhen a link state acknowledgement is received in response to a link state update.

How the community answered

(26 responses)
  • A
    8% (2)
  • B
    85% (22)
  • C
    4% (1)
  • D
    4% (1)

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Full 4A0-C01 Practice