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What IP protocol number is used in the protocol field of an IPv4 header, when IPv4 is used to tunnel IPv6 packets?

Posted: Sat Jul 23, 2022 7:10 pm
by answerhappygod
What IP protocol number is used in the protocol field of an IPv4 header, when IPv4 is used to tunnel IPv6 packets?

A. 6
B. 27
C. 41
D. 47
E. 51