IPv6 supports configuring the router authorization function on the device, verifying the identity of the peer through digital certificates, and selecting legal devices.
Digital envelope technology means that the sender uses the receiver's public key to encrypt the data and then sends the ciphertext to the receiver.
The trigger modes of the Portali authentication built in the firewall include pre-authentication and ( ) authentication. (fill in the blank)
In USG6000E, the initial priority of VGMP is ( ) (fill in the blank)