Which of the following is a characteristic of a firewall?

A. Examines each message as it seeks entrance to the network

B. Blocks messages without the correct markings from entering the network

C. Detects computers communicating with the Internet without approval

D. All of the above

Answer: Option D

Solution(By Examveda Team)

The characteristic of a firewall Examines each message as it seeks entrance to the network, Blocks messages without the correct markings from entering the network and Detects computers communicating with the Internet without approval.