COMPUTER NETWORKING

Detailed explanation-1: -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.

Detailed explanation-2: -Firewalls are useful when you need to block application-layer attacks and malware. They are invaluable for detecting and combating rogue activity throughout your network. Adopting a firewall for your client’s security infrastructure helps you set up their network with specific policies blocking or allowing traffic.