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: -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-4: -Functions of Firewall Therefore, a firewall’s primary function is to secure our network and information by controlling network traffic, preventing unwanted incoming network traffic, and validating access by assessing network traffic for malicious things such as hackers and malware.

Detailed explanation-5: -Passwords are used to prevent unauthorized access to an information system. If passwords are required, it minimizes the chance of an intruder accessing sensitive data since the firewall will prevent such access.