What is the default algorithm for IPv6 Authentication extension headers?

A.
Message Digest 3

B.
Message Digest 5

C.
Message Digest 6

D.
Message Digest 4

Explanation:
Authentication is accomplished via Message Digest 5, abbreviated as MD5.
Incorrect Answers:
A: The answer is MD5, so these other answers are incorrect.
C: The answer is MD5, so these other answers are incorrect.
D: The answer is MD5, so these other answers are incorrect.