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单选题
Why is NTP an important component when implementing IPSec VPN in a PKI environment?()
A

 To ensure the router has the correct time when generating its private/public key pairs.

B

 To ensure the router has the correct time when checking certificate validity from the remote peers

C

 To ensure the router time is sync with the remote peers for encryption keys generation

D

 To ensure the router time is sync with the remote peers during theDH exchange

E

 To ensure the router time is sync with the remote peers when generating the cookies during IKE phase 1


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