COMPUTER FUNDAMENTALS

Detailed explanation-1: -A firewall is a network security device that prevents unauthorized access to a network. It inspects incoming and outgoing traffic using a set of security rules to identify and block threats. A firewall can be physical hardware, digital software, software as a service (SaaS) or a virtual private cloud.

Detailed explanation-2: -A firewall is a security system designed to prevent unauthorized access into or out of a computer network. Firewalls are often used to make sure internet users without access are not able to interface with private networks, or intranets, connected to the internet.

Detailed explanation-3: -Firewall defined Working as a gatekeeper between trusted and untrusted networks, a firewall ensures legitimate content is able to pass through while blocking out potential hackers threatening to misuse or corrupt your device.

Detailed explanation-4: -Firewalls are commonly used to secure home networks from threats coming external networks such as the Internet. They can prevent outsiders from gaining access to private information and taking control of devices on a network.

Detailed explanation-5: -A firewall safeguards your PC against harmful data by filtering them out of the system. It protects against backdoors, denial-of-service attacks, macros, remote logins, spam, and viruses. A backdoor is a way to gain access to an application with a vulnerability that attackers exploit to gain access.