Preventing Unauthorized Access

D.

The best solution to prevent someone from using a stale administrator account to log into a seldom used server and access inappropriate websites is to implement an account expiration policy. This policy will ensure that inactive accounts are automatically disabled after a set period of time, which helps to minimize the risk of unauthorized access to sensitive data.

Explanation of the answer options:

A. Credential management: This refers to the process of managing user credentials (e.g., usernames and passwords) to ensure that only authorized users have access to sensitive data. While this is an important security measure, it does not directly address the issue of stale administrator accounts being used to access a server.

B. Group policy management: This refers to the process of managing group policies that control user access to resources in a network. While this is an important security measure, it does not directly address the issue of stale administrator accounts being used to access a server.

C. Acceptable use policy: This refers to a set of rules that define the acceptable use of a network or system. While this can help prevent users from accessing inappropriate websites, it does not directly address the issue of stale administrator accounts being used to access a server.

D. Account expiration policy: This refers to a policy that sets an expiration date for user accounts, after which they are automatically disabled. This is the best solution to prevent someone from using a stale administrator account to log into a seldom used server and access inappropriate websites.

In conclusion, an account expiration policy is the best solution to prevent someone from using a stale administrator account to log into a seldom used server and access inappropriate websites.