If the K bit in the GRE header is set to 1, a 4-byte Key field is inserted into the GRE header. The sender and receiver then authenticate each other based on this key.

If the K bit in the GRE header is set to 1, a 4-byte Key field is inserted into the GRE header. The sender and receiver then authenticate each other based on this key.
A . True
B. False

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Answer: B