Question

Define firewall.
Thank you for helping.

Answer 1

A firewall is a network security system, either hardware- or software-based, that controls incoming and outgoing network traffic based on a set of rules.

Answer 2

Afire wall Act as a barrier between a trusted network and other un trusted networks -- such as the Internet -- or less-trusted networks -- such as a retail merchant's network outside of a cardholder data environment -- a firewall controls access to the resources of a network through a positive control model. This means that the only traffic allowed onto the network defined in the firewall policy is; all other traffic is denied.Thank you!!! Hope this answer helps you!!!