You are designing a Group Encrypted Transport Virtual Private Network solution consisting of 30 group members. Which measure helps protect encrypted user traffic from replay attacks?

You are designing a Group Encrypted Transport Virtual Private Network solution consisting of 30 group members. Which measure helps protect encrypted user traffic from replay attacks?
A . counter-based anti-replay
B . time-based anti-replay
C . nonce payload
D . RSA-encrypted nonce
E . digital certificates

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Answer: B