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单选题
Which encryption type is used to secure user data in an IPsec tunnel?（）
A
symmetric key encryption
B
asymmetric key encryption
C
RSA
D
digital certificates
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单选题Which statement is true regarding a session key in the Diffie-Hellman key-exchange process?（）A
A session key value is exchanged across the network.B
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考题
单选题Which description about asymmetric encryption algorithms is correct？（）A
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