FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A firewall acts as a gatekeeper. It monitors attempts to gain access to your operating system and blocks unwanted traffic or unrecognized sources. A firewall acts as a barrier or filter between your computer and another network such as the internet. You could think of a firewall as a traffic controller.

Detailed explanation-2: -Its purpose is to block malicious traffic like viruses, malware, and hackers, and is the first line of security defense for your network. Firewalls can be physical devices, or a software program running on servers or workstations.

Detailed explanation-3: -To start, a firewalled system analyzes network traffic based on rules. A firewall only welcomes those incoming connections that it has been configured to accept. It does this by allowing or blocking specific data packets-units of communication you send over digital networks-based on pre-established security rules.

Detailed explanation-4: -A firewall is a security device, computer software or hardware, that can help protect your whole network by filtering traffic and blocking any outsiders from gaining access to the private data on your computer or network.

Detailed explanation-5: -A host-based firewall can help protect against attacks that originate from inside the network and also provide extra protection against attacks from outside the network that manage to penetrate the perimeter firewall.