In $2011,$ Sony was targeted by an SQL injection attack that compromised over one million emails, usernames, and passwords.

Which of the following could have prevented the attack?

answer

Careful configuration and penetration testing on the front end

Blocking, or at least monitoring, activity on ports $161$ and $162$

Using VPN technology to protect client data when connecting from a remote system

Scanning the operating system and application regularly for bugs and errors