Answer:
А. Enable time-of-day restrictions.
B. Disable inactive accounts on a timely basis.
E. Set expiration dates for all temporary accounts.
Explanation:
If a forensic investigation reveals that accounts belonging to employees who were terminated numerous years ago were recently used to gain unauthorized access on a company's web servers. The following controls if used by the network administrator would reduce the risk of this reoccurring;
1. Enable time-of-day restrictions: this settings would use the group policy to create an access rule that restricts users or traffics on the server once the time of day to access has elapsed
2. Disable inactive accounts on a timely basis: the network administrator should ensure inactive accounts of former employees are permanently disabled at regular intervals.
3. Set expiration dates for all temporary accounts: accounts that are being used temporarily should have an expiration date, so that they are automatically disabled on the company’s web server.
In conclusion, if all of this protocols or policies are judiciously implemented by the network administrator, it would be almost impossible for hackers to gain access to the company's web server.