What does a firewall?

A) Examines packets and decides which ones should be allowed to pass from one network to another.

B) Maintains a table which maps the IP addresses of two network so that packets can be redirected between the networks.

C) Compares packets to virus signatures so that packets which are know to be dangerous can be identified and stopped.

D) Prevents viruses from moving any further through a network

View Answer
Option – A.