Unit 1 – Internet Basics

Presentation 1

Web Programming

Objectives

At the end of this presentation, you will be able to• List the requirements to get Internet connection• Describe the types of Internet connections• Connect your computer to the Internet

Introduction to Internet

• WAN connects computers and devices over a large area.

• WANs are interconnected throughout the world to form Internet.

• Internet is a global network of networks.

Hands-On!

Browse and get the meaning of a word from the

site www.dictionary.com.1. Double-click the Internet Explorer icon on

the desktop to open Internet Explorer.

2. Type www.dictionary.com in the Address bar and press the Enter key.

3. Click the Word of the Day hyperlink.4. Note down the word of the day and its

meaning.

Requirements to get Internet connection

• A computer Processor : 486/66MHz Memory : 16 MB Video card which supports 640 X 480 resolution, 256

colors

• A telephone line

• A MODEM (Modulator and De-Modulator)

• An ISP (Internet Service Provider)

• A Web Browser

Types of Internet Connections

• Dial-up connection• Broadband cable• DSL and ISDN • Wireless connection

Dial-up connection

• Easy and inexpensive connection. • Speed is less than 56 kbps. • Data travels through telephone line. • Set up an account with your ISP.• Can connect and disconnect your computer

to the Internet whenever you want.

Broadband cable connection

• Connected to the Internet through a cable TV line

• Faster than dial-up connection • Dedicated connection • Can browse the Internet and watch the TV at

the same time.

DSL and ISDN connection

• DSL is Digital Subscriber Line. • ISDN is Integrated Services Digital Network. • Connected to the Internet through copper

telephone line. • Dedicated connection. • Errors are less while transmitting.• Faster than dial-up connection.

Wireless connection

• Connects Internet with PDAs, notebook computers and smart phones.

• Connection is established using satellite and cellular radio network.

• Faster than dial-up connections. • Dedicated connection.

Connecting to the Internet

• Double click the dial-up program’s icon in the desktop.

• In the Connect dialog box, type the username, password and dial number provided by the ISP.

• Click the Dial button. • A connection icon appears

on the taskbar.

Rabiah

Disconnecting from the Internet

• To disconnect, click the Connection icon in the task bar. The Status dialog box appears on the screen.

• Click the Disconnect button.

Activity 2.1.1

Browse the Internet and find the meanings of the

following terms:• Cybrarian• Cybercafe• Cybercitizen• E - paper• Electronic resume

Summary

In this presentation, you learnt the following:

• WANs are interconnected through out the world to form Internet

• MODEM converts analog signals into digital signals and vice-versa.

• Data travels through telephone line in dial-up, DSL and ISDN connections.

Summary

• In broadband cable connection, computers are connected to the Internet through a cable TV line.

• Wireless connection connects Internet with PDAs, notebook computers and smart phones

Assignment

1. Define the term Internet.

2. List the requirements to get Internet connection.

3. Write short notes on Dial-up connection.

4. Write down the steps to connect your computer to the Internet.