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ANTIVIRUS
A set of programs that identify and remove malware are known as antivirus software. You
must have an antivirus software installed on your computer. It detects the virus in the computer
and does not let the virus copy itself on your computer system.
Hundreds of new viruses are developed every hour. Antivirus software
developers regularly release updates on the Internet that allow their
programs to detect the latest known viruses. You can update your copy
of antivirus only through the Internet. So, it is essential to have an Internet
connection to update antivirus software.
Some well-known antivirus programs are Norton, Quick Heal, AVG, McAfee, Symantec,
Kaspersky, etc.
Norton Quick Heal AVG McAfee
FIREWALL
The term ‘firewall’ originally referred to a wall intended to confine a fire or potential fire within
a building. In computer, a firewall is a software or hardware-based network security system
that controls the incoming and outgoing network traffic according to a set of predefined rules.
A firewall acts like a gatekeeper and prevents unauthorised access to a computer network. A
firewall examines each data packet that arrives on the network and decides whether to allow or
block it based on these rules. Essentially, a firewall creates a barrier between a trusted and secure
internal network and an external network (such as the Internet) that is considered untrusted and
potentially insecure.
Recap
A computer virus is a ‘piece of code’ or 'program' developed to corrupt the data or
program files stored on the computer system.
A malware is a type of malicious program designed to damage or carryout other
unwanted actions on a computer system.
The different types of malware are worm, trojan horse, spyware, ramsomware and
rootkit.
A set of programs that identify and remove malware are known as antivirus software.
A computer gets infected through various ways like e-mail attachments, infected
removable media, malicious ads etc.
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