The SIP protocol uses the SDP message to establish a session, and the SDP message contains the remote address or multicast address
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.
After the firewall detects a virus, which of the following will release the virus?
How many IPSec SAs need to be established to encapsulate P packets using the AH+ESP protocol?
Which of the following VPNs cannot be used in site-to-Site scenarios?