单项选择题

You work as a network engineer， do you know an IPsec tunnel is negotiated within the protection of whichtype of tunnel？（）

A.L2F tunnel
B.L2TP tunnel
C.GRE tunnel
D.ISAKMP tunnel

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单项选择题

For the following items， which management topology keeps management traffic isolated from ActualTests.comproduction traffic？（）

A.OTP
B.OOB
C.SAFE
D.MARS

单项选择题

Which description about asymmetric encryption algorithms is correct？（）

A.They use the same key for encryption and decryption of data.
B.They use different keys for decryption but the same key for encryption of data.
C.They use different keys for encryption and decryption of data.
D.They use the same key for decryption but different keys for encryption of data.

单项选择题

For the following items ，which one can be used to authenticate the IPsec peers during IKE Phase 1？（）

A.pre-shared key
B.integrity check value
C.XAUTH
D.Diffie-Hellman Nonce