MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -A firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form, or in a combination of both. Firewalls prevent unauthorized internet users from accessing private networks connected to the internet, especially intranets.

Detailed explanation-2: -The firewall works by filtering the incoming network data by looking at IP address, Protocol, Destination, Domain names, Keywords, Port, etc. Based on this, either allows or denies permission. The network administrator determines and customises these rules.

Detailed explanation-3: -The correct answer is A system that prevents unauthorized access to a private network. A firewall is a system that prevents unauthorized access to a private network. It is a type of cybersecurity tool that is used to filter traffic on a network.

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: -A firewall is essential software or firmware in network security that is used to prevent unauthorized access to a network. It is used to inspect the incoming and outgoing traffic with the help of a set of rules to identify and block threats by implementing it in software or hardware form.