A router running a link-state protocol sends an update to a neighbor. The neighbor sends an update back. Why would the neighbor do this?

Question

Options

• AThe neighbor's link-state database has newer information than what it received in the update.
• BThe neighbor sends the update as an acknowledgement.
• CThe neighbor's update indicates that it has run out of space in its LSDB.
• DThe neighbor's update indicates that the sequence number received is the same as the one already in its link-state database.

• A
  73% (24)
• B
  15% (5)
• C
  3% (1)
• D
  9% (3)

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