A. The terminal device directly interacts with the security policy server, and the terminal reports its own status information, including virus database version, operating system version, and terminal Information such as the patch version installed on the device.

B. The security policy server checks the status information of the terminal, and for terminal devices that do not meet the corporate security standards, the security policy server reissues. The authorization information is given to the access device.

C. When a terminal device accesses the network, it first authenticates the user's identity through the access device, and the access device cooperates with the authentication server to complete the user Authentication.

D. The terminal device selects the answer to the resource to be accessed according to the result of the status check.