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4A0-101 · Question #14

What is the protocol number for OSPF in the IP header?

The correct answer is D. OSPF has its own protocol number of 89. See the full explanation below for the reasoning.

Question

What is the protocol number for OSPF in the IP header?

Options

  • AOSPF uses TCP, so the protocol number is 6.
  • BOSPF uses UDP, so the protocol number is 17.
  • COSPF does not use IP.
  • DOSPF has its own protocol number of 89.

How the community answered

(26 responses)
  • A
    4% (1)
  • B
    12% (3)
  • C
    4% (1)
  • D
    81% (21)

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