CompTIA 220-801 Certification Practice Test

Answer - D - Hardening is the process of improving the security of an operating system or application.

Key Takeaway: Hardening is the process of securing a system by reducing chances of failure against attacks. Reducing known routes of attack typically includes the removal of unnecessary software, unnecessary usernames or logins, and the disabling or removal of unnecessary services. Eliminating the use of unneeded protocols is also a good method of hardening an OS.