Unit 2 - Session 2

Question 1

What is a network?

Answer 1

A collection of computers and other hardware components interconnected by communication channels (cables or satellites) that allow sharing of resources and information.

Question 2

Peer-to-Peer architecture

Answer 2

P2P: Networks in which all computers have an equal status. Generally each terminal had an equally competent CPU.

Question 3

Client-Server Architecture

Answer 3

Networks in which certain computers have special dedicated tasks, providing services to other computers in the network are called client-server networks. The computer(s) which provide services are called severs and the ones that use these services are called clients.

Question 4

LAN

Answer 4

Local Area Network: Connect computers and devices in a limited geographical area such as home, school, computer laboratory, office building, or closely positioned group of buildings.

High speeds, connecting computers and peripherals like printers.

Question 5

WAN

Answer 5

Wide Area Network: Covers a broad area. The Internet is the most popular WAN and is used by businesses, governments, individual consumers, etc.

Question 6

What is the Internet?

Answer 6

A global system of interconnected computer networks that use the standard Internet protocol suites to serve billions of users worldwide.

It is a network of networks.

Question 7

Used of Internet

Answer 7

• Research and general information
• Access databases
• Social contacts
• Entertainment

Question 8

WWW

Answer 8

World Wide Web/ W3:

A system of interlinked hypertext documents accessed through the Internet. You can navigate through web pages containing text, images, videos, etc. using hyperlinks.

Question 9

What is a web browser?

Answer 9

A software used to view websites and act as an interface between the user and the WWW.

Question 10

What is the web server?

Answer 10

A computer that stores web sites and their related files for viewing on the Internet.

Question 11

Advantages of networking

Answer 11

• Data sharing
• Hardware sharing
• Internet access sharing
• Usage of network based apps.

Question 12

BSNL full form

Answer 12

Bharat Sanchar Nigam Limited.

Question 13

ISPs

Answer 13

BSNL, Airtel, MTS, Vodafone, Tata Docomo.

Question 14

What are ISPs?

Answer 14

Organisation which provides access to the Internet via a dial-up or direct or wireless connection.

Question 15

Modem

Answer 15

MOdulator/DEModulator coverts digital to analog signals and vice-versa.

Question 16

Dial-up

Answer 16

Used the facilities of PSTN to connect to the ISP via telephone lines using MODEM. Very slow.

Question 17

DSL

Answer 17

Transmit digital data over wires of a local telephone network and provide Internet access. Delivered along with wired telephone service on the same telephone line. Simultaneous use of telephone and Internet. DSL MODEM Na subscription required.

Question 18

Cable Internet Access

Answer 18

Form of broadband, uses cable television infrastructure. Similar to DSL, but over cable TV networks.

Question 19

3G

Answer 19

Set of standards used for mobile devices and mobile telecommunication services and networks. Subscribe with ISP for 3G for access.

Question 20

HSDPA

Answer 20

A 3G mobile telephony communication protocol that allows higher data transfer speeds and capacity.

Question 21

WiMAX

Answer 21

A wireless communications standard designed to provide mobile broadband connectivity across cities and countries through a variety of devices.

Long-range, used where DSL or cable can’t be used.

Question 22

Wi-Fi

Answer 22

Allows an electronic device to exchange data wirelessly over a network, including high-speed internet connections. Devices connect through a device called WAP. Wi-Fi is used where wired cannot be run, and where users require mobile connectivity.

Question 23

How is data transferred over the Internet?

Answer 23

• Data is broken up into packets
• Header added to each packet explains origin and destination of packet, and where it fits in with the rest of the packets.
• Packet sent from comp to comp and sent to its destination. All packets might not take the same route.
• Packets are examined at destination and if any faults, request for resend is sent. Continues till all packets are received.

Question 24

What do you need to access Wi-Fi?

Answer 24

Need access point with active internet connection.

Question 25

What does a Wi-Fi router do?

Answer 25

Acts as both an Internet connectivity device as well as an access point for wi-go connectivity.

Question 26

How to view list of wireless networks available in Windows XP?

Answer 26

Right click on Wireless Icon in system tray > View Available networks

List of wi-fi networks appears, double click on the name. Enter password if required by a secure network.