CompTIA Security+ Exam Prep

Answer: D - A brute force attack is an attempt to guess passwords until a successful guess occurs.

A brute force attack consists of trying every possible code, combination, or password until you find the right one. This type of attack usually occurs over a long period. Some of the steps that can be taken to avert brute force attacks include increasing the length of the PIN/password, allowing the PIN/password to contain characters other than numbers/alphabets, imposing a 30-second delay between failed authentication attempts, and locking the account after 5 failed authentication attempts.