Which of the following statements about OSPF protocol packets is wrong?

 Which of the following statements about OSPF protocol packets is wrong?
A . The header format of all OSPF packets is the same
B. All OSPF packet headers carry the Router-ID field
C. The OSPF protocol uses five types of packets to complete the transfer of routing information
D. OSPF packets are encapsulated in UDP packets, and the port number is 89

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Answer: D