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多項(xiàng)選擇題

Which three statements about the Cisco Easy VPN feature are true?()

A.If the VPN server is configured for Xauth, the VPN client waits for a username / password challenge.
B.The Cisco Easy VPN feature only supports transform sets that provide authentication and encryption.
C.The VPN client initiates aggressive mode (AM) if a pre-shared key is used for authentication during the IKE phase 1 process.
D.The VPN client verifies a server username/password challenge by using a AAA authentication server that supports TACACS+ or RADIUS.
E.The VPN server can only be enabled on Cisco PIX Firewalls and Cisco VPN 3000 series concentrators.
F.When connecting with a VPN client,the VPN server must be configured for ISAKMP group 1,2 or 5.

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