Chapter 1

INTRODUCTION TO THE INTERNET

1. Fill in the blanks.
a. The first page of a website is called the __________.
Ans:- Homepage
b. Areas with Wi-Fi service are called __________.
Ans:-Hotspots
c. The_______part of TCP/IP is responsible for breaking up data into smaller pieces at the source computer.
Ans:-TCP
d.___________ are the programs that help users navigate the WWW.
Ans:-Web Browser
e.____________ part of http://www.mywebpage.org represents the service provider.
Ans:-http://
f.____________is a collection of related web pages, images, and videos hosted on a web server.
Ans:-website.
g. The_______is a series of servers interconnected through hypertext.
Ans:-World Wide Web

h. The_______ is a communication protocol used on the Web to transfer all kinds of information.
Ans:-HTTP
i. A web page,is a special type of file written in___________
Ans:-HTML
j. The______________is a global network of networks.
Ans:-Internet

2. Write T for the True statement and F for the False one. Correct the false statement(s).
a. The Internet is an interconnection between several computers of the same kind.
Ans:-F
b. The first network, called the ARPANET, was started in England.
Ans:-F
c. Protocols are a set of rules that computers use to communicate logically.
Ans:-T
d. All the computers have direct connections to the Internet.
Ans:-F
e. Routers help connect to the Internet through telephone lines.
Ans:-F
f. Each computer on the Internet has an address called IP address.
Ans:-T
g.At the destination, TCP reassembles the packets into a complete message.
Ans:-T
h. You can also connect to the Internet through the same cable system that you use for watching cable television.
Ans:-T
i, Web pages on a site are linked together through hyperlinks.
Ans:-T
j. A website can contain four web pages at the most.
Ans:-F

3. Choose the correct option:-
a. Which of the following is not a web browser?
i. Mozilla Firefox ii. Google Chrome iii. Internet Explorer iv. Microsoft Word
Ans:-iv. Microsoft Word

b. Each web page has a unique address called_______________
i. URL ii. TCP iii. WWW iv. none of these.
Ans:-i. URL

c. Which of the following can be present on a web page?
i.Images ii.Videos iii.Audio iv.All of these.
Ans:-iv.All of these.

d. Which of the following is not an ISP in India?
i.MTNL ii.Vodafone iii. Airtel iv.TCP/IP
Ans:-iv.TCP/IP

e. The process of converting a digital signal into an analog signal is called
i. modulation ii.Demodulation iii.Transformation iv.none of these.
Ans:-i. modulation

f. A ——- directs Internet traffic by determining the best path that can be taken to transfer data
i. Modem ii.Router iii.ISP iv.none of these.
Ans:-ii.Router

g. The protocols that are commonly used for working with the Internet are
i. Internet Protocol ii. Transmission Control Protocol iii. Both i and ii iv.none of these.
Ans:-(iii). Both i and ii.

h. A —— helps to connect to the through telephone or cable lines
i. Modem ii.Router iii.Cable iv.none of these.
Ans:-i. Modem

i. When data is passed from one computer system to another, it is broken up into pieces called packets using ——
i. TCP ii.IP iii.ISP iv.none of these.
Ans:-(i). TCP

j. The internet connection is provided by __________
i. an IP ii. an ISP iii. a TCP iv. none of these.
Ans:-(ii).an ISP

 

1.Short Answer Questions

a.What is the Internet ?

Ans: The Internet is an interconnection of several computers from different networks spread across the world.It is a global network of networks.

b.What do you mean by protocols?
Ans: Protocols are a set of rules that computers use to communicate logically .

c.Mention the names of any two ISP’s in India.
Ans: The names of ISP’s in India are:
i . Airtel .
ii . Vodafone.

d.Give the full form DSL and ADSL?

Ans: DSL–Digital Subscriber Line.
ADSL–Asymmetric Digital Subscriber Line.

e.Name any two commonly used web browsers.

Ans: Two commonly used web browsers are:
i . Google Chrome.
ii . Mozilla Firefox.

f .What do you mean by the Home page?

Ans: The first web page of a website is called the home page.

g.What is the HTML used for?

Ans: HTML is a language used to write web pages.

h.What is the other name for Letter Addressing System? Give one example of letter addressing system?

Ans: The other name for letter addressing system is Domain Name System.
One example of letter addressing system is sebahelp.com

i .What is the domain extension of the following?

Ans: i .Educational institutions  ⇒ .edu

ii .Networking Organization ⇒ .net

j .Write a short-note on 3G?

Ans: The third generation of mobile telecommunication Technology provide high data transfer speed of at least 200 Kbps. It finds application in video call , mobile internet access, GPS and fix wireless internet access.

2.Long Answer Questions

a.Mention the protocols commonly used for working with the Internet .

Ans: The protocols commonly used for working with the Internet are Internet Protocol ( I P)& Transmission Control Protocol ( TCP) .

b.Explain the use of channels.

Ans: A channel is a medium used to carry information or data from one computer to another.These channels then connect to the internet via routers and modems.This way, several pathways from one system to another can be established.

c.Differentiate between router and a modem?

Ans: Routers are devices that direct Internet traffic by determining the best path to be taken, where as modems helps computers and computer networks to connect to the Internet through telephone or cable lines.

d.What is an IP address and what is its use?

Ans: Each computer system on the Internet has an unique address  called an IP address.
Uses of IP address:- 1) host or network interface identification. 2) Location addressing.

e.Explain the process of sending data from one computer system to another .

Ans: When Data is passed from one computer system to another, it is broken up into pieces called packets using TCP. Each packet contains 1500 bytes or characters. IP adds the IP address of the sender and the destination to each packet so that it reaches the correct destination.

These packets are passed from one network to another until they reach their destination.At their destination, TCP reassembles the packets into a complete message.If the packets are damaged or lost, a request is sent to the sender to resend them through different paths.

f .What do you mean by modulation and demodulation?

Ans: The process of converting a digital signal into an analog signal is called modulation.
The process of converting an analog signal into an digital signal is called demodulation.

g.What do you mean by World Wide Web?

Ans: World Wide Web is an internet based network of servers that are interconnected through hypertext which is a method of presenting information in which the selection of highlighted text displays more information on a particular topic.

h.Differentiate between a websites and a web page.

Ans: A website is a collection of one or many related web pages, images, videos, and other digital assets hosted on a web server . Where as the world wide web comprises of a large collection of documents called web pages. A web page is an electronic document written in the computer language Hyper Text Markup Language( HTML) .Each web page has a unique address called the Uniform Resource Locator( URL) which identifies its location on the network.

i .What is an HTTP? What is it required?

Ans: The Hypertext Transfer Protocol ( HTTP) is a communication protocol used to transfer all kind of information( text , images, video, sound and other multimedia files) on the web.

It is required in a web browser to send the request to the server machine. The server receives the request and after performing any necessary processing, returns the requested files to the client( i .e web browser )that made the request running on your computer .

j .Explain the two types of Web addressing systems with examples.

Ans: (i) Letter Addressing System :- The web address of any computer or network can be given using alphabets.This is called the Letter Addressing System And it is popularly known as Domain Name System.
Eg: -sebahelp.com, assam.gov.in, yahoo.com, hotmail.com etc..

(ii) Number Addressing System:- Every TCP/ IP network requires a unique network number and every host on a TCP/IP network requires a unique IP address.
Eg: -132. 168. 1. 100
Network Part :- 132. 168.

Host Part :- 1. 100

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