What Is Firewall?

A firewall is a network security device that observes and filters incoming and outgoing network traffic, adhering to the security policies defined by an organization. It acts as a protective wall between a private internal network and the public Internet.

Fencing your property protects your house and keeps trespassers at bay; similarly, firewalls are used to secure a computer network. 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. They are a vital component of network security. Most operating systems have a basic built-in firewall. However, using a third-party firewall application provides better protection.

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Source: LinkedIn

Credits: Amena Johor