A brute-force attack is a method attackers use to gain access to a computer system or online account. It involves repeatedly attempting to enter different combinations of username and passwords until the correct combination is found.

To protect against this type of attack, here are some suggestions:

1. Create strong passwords with a variety of letters, numbers, and special characters.
2. Enable two-factor authentication whenever possible.
3. Change passwords regularly, ideally every few months.
4. Limit login attempts with a lockout policy.
5. Install the latest security updates as soon as they become available.
6. Use a reputable antivirus program to help detect and block malicious attempts to gain access.