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FIREWALL
The term ‘firewall’ originally referred to a wall intended to confine a fire Factopedia
or potential fire within a building. In computer, a firewall is a software
or hardware-based network security system that controls incoming
and outgoing network traffic based on applied rule set. A firewall acts
like a gatekeeper and prevents unauthorised access to a computer
network. It inspects every data packet that arrives at the network and
decides, based on a set of predefined rules, whether to allow or block Most malware
programs are
it. A firewall establishes a barrier between a trusted, secure internal distributed over
network and another network (for example, the Internet) that is not the Internet, often
assumed to be secure and trusted.
bundled with other
software.
Let’s CatCh uP
State whether these statements are true or false.
1. Encrypted data can be understood easily. ________
2. Retina is the layer of blood vessels at the back
of the eye. ________
3. Antivirus is used to eradicate viruses from the The first known
computer. ________ ransomware, the
4. Rootkit is a type of malware that gains "AIDS Trojan" was
administrator access to the host system. ________ launched in 1989.
Let’s BaCk-uP
30th November is
Computer safety refers to the protection of computer-
based resources against unauthorised use or physical known as “Computer
damage. Security Day’’.
Authentication is the process of verifying a user’s identity
before granting him or her access to a computer system.
Password protection, face recognition, voice recognition are
some important techniques for computer safety.
Malware is designed to damage or do unwanted actions on The first computer
a computer system. worm named Morris
A program that identify and remove malware are known as worm was developed
antivirus software. in November 2, 1988.
A firewall is a software or hardware-based network security
system that controls incoming and outgoing network traffic
based on applied rule set.
Computer Safety and Security 73

