Page 115 - Viva ICSE Computer Studies 8 : E-book

Quick Recall

• Local area network (LAN) connects several computers within a confi ned geographical area.
• Wide area network (WAN) connects users across large distances, often crossing the geographical
boundaries of cities and states.
• Metropolitan area network (MAN) is generally confi ned to a single metropolitan city.
• Some of the common wired-data transmission media are coaxial cables, fi bre-optic cables and
ethernet cables.
• Some of the common wireless data transmission media are infrared rays, bluetooth and wi-fi .

• Internet is the world’s largest computer network that provides several benefi ts to the
organisation and computer users.

• The basic function of a modem is to enable communication between computers on a network.

A. Fill in the blanks.
1. A _______________ is a set of rules to be followed during data communication.

2. Computer network is a group of _______________ and _______________, connected by a
communication channel.
3. _______________ network is confi ned to a single metropolitan city.
4. _______________ technology is a short range communication that covers a range of around
5 metres.
5. The process of translating digital signals into analog signals is called _______________.

B. State whether the following statements are true or false.

1. IP address identifi es the location of a particular computer on the Internet. _________
2. Domain name is also called letter addressing system. _________

3. HTTP stands for Hypertext Transport Protocol. _________
4. SMTP specifi ed the format of e-mail messages. _________
5. IMAP is the recommended method when you need to check your e-mails
from diff erent devices. _________

C. Choose the correct answer.
1. _______________ stands for wireless fi delity.

(a) Wi-fi (b) Modem (c) Hub (d) Internet
2. _______________ is a device that connects multiple devices and computers to a network.

(a) Modem (b) Hub (c) Wi-fi (d) Internet

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