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4A0-C01 · Question #4

When a router receives an IP packet, but does not find a match in the routing table for the destination IP address, what actions are performed by the router?

The correct answer is B. The packet is dropped and an ICMP unreachable message is sent back to the source.. See the full explanation below for the reasoning.

Question

When a router receives an IP packet, but does not find a match in the routing table for the destination IP address, what actions are performed by the router?

Options

  • AThe packet is flooded out all router interfaces.
  • BThe packet is dropped and an ICMP unreachable message is sent back to the source.
  • CThe packet is silently discarded.
  • DThe packet is flooded out all interfaces and an ICMP unreachable message is sent.

How the community answered

(35 responses)
  • A
    3% (1)
  • B
    74% (26)
  • C
    14% (5)
  • D
    9% (3)

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