A high traffic website is experiencing numerous brute force attacks against its user base. The attackers are using a very large botnet to carry out the attack. As a
result, many users passwords are being compromised Which of the following actions is appropriate for the website administrator to take in order to reduce the
threat from this type of attack in the future. .
A.
Temporarily ban each IP address after five failed login attempts
B.
Prevent users from using dictionary words that they have used before.
C.
Prevent users from using passwords they have used before.
D.
Require user passwords to be at least ten characters in length