COMPUTER NETWORKING

Detailed explanation-1: -A firewall is a digital security system that checks all incoming and outgoing traffic on a network according to a defined set of rules. A firewall keeps out unauthorized traffic and lets in only communications that are deemed safe, using a set of security rules that you or your network administrator set up.

Detailed explanation-2: -Firewall Definition A firewall is a security system designed to prevent unauthorized access into or out of a computer network.

Detailed explanation-3: -Explanation: A firewall can be the type of either a software or the hardware device that filters each and every data packet coming from the network, internet. It can also be considered as a device installed at the boundary of an incorporate to protect form unauthorized access.

Detailed explanation-4: -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.