Page 128 - Viva ICSE Computer Studies 6 : E-book

Spamming: The use of electronic messaging systems like e-mails to send unwanted messages to a
large number of recipients

Malware: A program that harms the computer in use
Scareware: A type of malicious software that tricks the user to purchase and download software
that are harmful for the computer
Trojan horse: A computer program that tricks the user by acting as an original fi le
Worm: A small software program that uses computer networks and takes advantage of security
weaknesses to replicate

Ransomware: A type of malware which locks the data on the user’s computer and demands
payment to unlock the data

Keylogger: A software that once installed on a system records every keystroke made on the system
Netiquette: A set of rules that the user is expected to follow when he/she is online

Quick Recall

• The Internet can be defi ned as a technology for linking local area networks (LANs) into a huge
global computer network.
• E-learning acts as a network enabled system which allows the learners to learn skills and
knowledge at the same or diff erent time from any location.
• Electronic mail (E-mail) has become so popular that now people prefer it to postage mail.
• The users can make free audio and video calls through the Internet at a lower rate as compared
to the telephonic calls.
• Online chatting helps people to chat with each other so that they can talk with their old friends
and make new friends across the world.
• With video conferencing systems, the participants not only hear the voice but also see each
other.
• In one-way mode, which is also known as point-to-point video conferencing, one of the
locations sends the information and others receive it.
• In multi-way mode, which is also known as multi-point video conferencing, two or more
locations can send or receive the information simultaneously.
• Web publishing (electronic publishing) is a new approach of publishing on the Internet, which
is replacing paper books with electronic books.
• Social networking is the most common and popular tool of the Internet. It enables people
to stay connected with their friends, relatives, family members, acquaintances, business
associates, celebrities or anyone in the world online by exchanging messages and information
in any form of media.
• The Internet television broadcasting appears similar to the normal television broadcasting in
the presence of good Internet connection and supporting computing device.

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