What can you use as a protective barrier on a network to keep out unauthorized traffic?
A) Firewall
B) Network attached storage (NAS)
C) Encryption
D) Biometric devices

Question

Quizplus · Accepted Answer

A firewall is specifically designed to block unauthorized traffic and provide a protective barrier on a network. NAS is a storage device and does not provide security. Encryption is a security measure, but it does not block unauthorized traffic. Biometric devices are a form of authentication and do not necessarily provide a protective barrier on a network.

What Can You Use as a Protective Barrier on a Network