Chapter 1: Introduction to the Internet


Class 10 SEBA Computer Notes

Introduction to the Internet 


1. Short answer questions.

a. What is Internet ?

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


b. What are Protocols? 

Ans :- Protocols are a set of rules that computers use to communicate logically.


c. Mention the names of any two ISPs in lndia.

Ans: Two popular ISPs in India are

(i) Airtel 

(ii) Vodafone 


d. Give the full form of DSL and ADSL.

Ans: The full form of DSL and ADSL are - 

DSL: Digital Subscriber Line

ADSL: Asymmetric Digital Subscriber Line. 


e. Name any two commonly used web browsers.

Ans. Any two commonly used web browsers are - Microsoft Internet Explorer and Google Chrome.


f. What do you mean by the home page?

Ans. The first web page of a website is called the homepage Through the home page, a company of an individual tells us how to get to their website having one of many web pages .


g. What is HTML used for?

Ans: HTML stands for Hypertext Markup Language is a computer language used to create web pages that are displayed on the world Wide Web.


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 (DNS). 

Some examples of the letter addressing system are assam.gov.in,  yahoo. com,hotmail.com and oup.com


i. What is the domain extension of the following?

(i) Educational institutions

Ans:   .edu

(ii) Networking organizations

Ans:   .net


j. Write a short note on 3G.

Ans: 3G in the third generation of  mobile telecommunications  technology which provides high data transfer speed of at least 200 Kbps. It is the upgrade for 2G and 2.5G  GPRS networks, for faster data  transfer speed. This is based on a set of standards used for mobile devices and mobile telecommunication services and networks that comply with the International Mobile Telecommunication-2000(IMT-2000) specifications by the International Communication Union. It finds application in video calls, mobile Internet access, GPS and fixed 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-

(i) TCP: Transmission Control Panel

(i) IP: Internet Protocol


b. Explain the use of channels. 

Ans: A channel is a medium used to carry information or data from one computer to the 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 a router and a modem.

Ans: The difference between a router and a modem is -

Routers are devices that direct Internet traffic by determining the best path to be taken. Whereas, modems help 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?

Ang:- Each computer system on the Internet has an Internet address called an IP address. 
This IP address is used to exchange information, send or receive e-mail messages etc.


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

Ans :- While working with the Internet, two protocols are required that are TCP and IP. 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 the sender and the destination to each packet so that it reaches the correct destination .

The packets are passed from one network to another until they reach their destination . At the destination, TCP resembles the packets into a complete message. If the packets are grab led, request is made to the sender to resend them. It is not necessary for all the packels in a single message to take the same route through the internet or for the same message to take the same route each time it is sent. Thus, one of the technical strengths of the Internet is that if some parts of it are unavailable for communicating data, the data will still be sent through another path.

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