A. Each department's system is independently authenticated and uses a single static password for authentication.

B. According to the administrator configuration, realize the correspondence between operation and maintenance users and back-end resource accounts, and restrict the unauthorized use of accounts.

C. According to the password security policy, the operation and maintenance security audit system automatically changes the background resource account password on a regular basis.

D. Each system operates, maintains and manages independently, and there is no audit monitoring during the access process.