Answer :
A firewall is a system that stops particular types of information from traveling between untrusted networks and private networks by inspecting each data transmission and blocking those that do not comply with established security standards.
What is a firewall?
A firewall is a piece of software or firmware that blocks unauthorized network access. It examines incoming and outgoing communications using a set of rules to detect and prevent threats.
Firewalls are used in both home and commercial settings, and they are built into many devices, including Mac, Windows, and Linux PCs. These are often recognized as critical components of network security.
Firewalls are significant because they have a significant impact on contemporary security strategies and are still frequently utilized. They initially appeared in the early days of the internet, when networks need new security mechanisms to deal with rising complexity.
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