COMPUTER NETWORKING

Detailed explanation-1: -Explanation: A firewall is a system designed to protect a computer or computer network from network-based attacks.

Detailed explanation-2: -Firewalls are network security systems that prevent unauthorized access to a network. It can be a hardware or software unit that filters the incoming and outgoing traffic within a private network, according to a set of rules to spot and prevent cyberattacks. Firewalls are used in enterprise and personal settings.

Detailed explanation-3: -However, you can restrict outside access to your computer-and the information on it-with a firewall. What do firewalls do? Firewalls provide protection against outside cyber attackers by shielding your computer or network from malicious or unnecessary network traffic.

Detailed explanation-4: -A firewall is a digital security system that checks all incoming and outgoing traffic on a network according to a defined set of rules. A firewall keeps out unauthorized traffic and lets in only communications that are deemed safe, using a set of security rules that you or your network administrator set up.