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Don’t open any unknown e-mail.
Don’t open any e-mail attachment from unknown sources.
Don’t download music, program or games from unknown sources on the Internet.
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.
24 Premium Edition-VII

