(The network admission control system (hereinafter referred to as UniNAC) can successfully log in to the operating system by using an AD domain account, and automatically end the admission authentication, record the corresponding statistical content in the admission statistics, and verify that the AD domain account can end the real-name system; The /CA smart card certificate can successfully log in to the operating system, and automatically ends the access authentication. The access statistics record the corresponding statistical content. After the smart card certificate is verified, the real-name system processing can be ended; the authentication process does not require user intervention. When the user inserts the USB- After the key, the authentication client can automatically obtain the corresponding certificate information and automatically perform endpoint access authentication.)