單項選擇題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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2.單項選擇題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.

3.單項選擇題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

4.單項選擇題

Which description is correct based on the exhibit and partial configuration?()

A.All traffic destined for network 172.16.150.0 will be denied due to the implicit denyall.
B.All traffic from network 10.0.0.0 will be permitted.
C.Access-list 101 will prevent address spoofing from interface E0.
D.This ACL will prevent any host on the Internet from spoofing the inside network address as the sourceaddress for packets coming into the router from the Internet.

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