User authentication is the authentication of the client's identity by the SSL virtual gateway, including: ________, server authentication, certificate anonymous authentication and certificate challenge authentication.

When the firewall upgrades the signature database and virus database online through the security service center, the firewall must first be able to connect to the Internet, and secondly, the correct DNS address must be configured.

What protection levels are included in TCSEC standard? (Multiple Choice)

Which of the following is not part of the digital certificate?

The tunnel addresses at both ends of the GRE tunnel can be configured as addresses of different network segments.