FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A firewall is a computer network security system that restricts internet traffic in to, out of, or within a private network. This software or dedicated hardware-software unit functions by selectively blocking or allowing data packets.

Detailed explanation-2: -A firewall is software or firmware that prevents unauthorized access to a network. It inspects incoming and outgoing traffic using a set of rules to identify and block threats.

Detailed explanation-3: -The main difference between a hardware firewall and a software firewall is that the hardware firewall runs on its own physical device, while a software firewall is installed on another machine. A common example of a software firewall is the firewall built into most operating systems like Windows and macOS.

Detailed explanation-4: -A Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization’s previously established security policies. At its most basic, a firewall is essentially the barrier that sits between a private internal network and the public Internet.

Detailed explanation-5: -Application-level gateway This kind of device–technically a proxy and sometimes referred to as a proxy firewall–functions as the only entry point to and exit point from the network.