Shroff S.R. Rotary Shroff S.R. Rotary Institue of Chemical Institue of Chemical Technology (Technology (SRICTSRICT))

ICTICTPresentation on Presentation on InternetInternetBY: BY: Raj ParekhRaj ParekhJaymeet PatilJaymeet Patil

What is the Internet?What is the Internet? A world-wide network of computers A world-wide network of computers

allows people to share information allows people to share information electronicallyelectronically

Like a BIG book with many web-Like a BIG book with many web-pages on different topicspages on different topics

Can be accessed anywhere with an Can be accessed anywhere with an Internet connectionInternet connection

How to connect to the How to connect to the InternetInternet

Three main ways to connect to the Three main ways to connect to the InternetInternet

Dial-UpDial-Up High Speed/DSLHigh Speed/DSL Wireless Connection (Wi-Fi)Wireless Connection (Wi-Fi)

Dial-Up Internet ConnectionDial-Up Internet Connection Dial-UpDial-Up

All you need is a computer, phone-line and Internet Service Provider! (ISP)

Not as fast as other Internet connections, but often more affordable

ISP InternetYour computer Landline

Slide Slide 55

REGIONAL

LOCAL

1. You request a Web page.

2. Your request goes to your ISP’s point of presence (POP).

3. Your request goes to a network access point (NAP).

4. Your request goes to a national backbone network.

5. Your request reaches the Web site’s server and the Web page is sent back to you in packets.

YOU ARE HERE

NATIONALClick to view animation. Click once only.

How it worksHow it works

Slide 6Slide 6

Web addresses are an addressing system that Web addresses are an addressing system that identifies where a Web resource is located.identifies where a Web resource is located.

The The uniform resource locatoruniform resource locator ( (URLURL) is the ) is the standard used to identify Web resources.standard used to identify Web resources.

The URL consists of:The URL consists of:

URL

Web Addresses (URLs)Web Addresses (URLs)

http://

Protocol identifies the means of access

www.yahoo.com/

Server contains the domain name of the Web server

help/shop/

Path identifies the

location of the document

shop-01.html

Resource specifies the

filename of the resource

The Internet’s HistoryThe Internet’s History Significant events in the history of the Internet.Significant events in the history of the Internet.

1962

1969

1972

1983

1989 1994

1995

J.C.R. Lickliter conceives of the idea of a “galactic network”.

Ray Tomlinson invents e-mail.

The World Wide Web is developed.

The first graphical Web browser is developed.

ARPANET goes online, connecting four computers.

Internet protocols begin.

Barriers to commercial activity are lifted.

Click on the dates for more information.

Web BrowserWeb BrowserA web-based program that displays the A web-based program that displays the

InternetInternetCommon Web BrowsersCommon Web Browsers

Safari: for Apples/MacintoshSafari: for Apples/Macintosh

Internet Explorer: for Windows onlyInternet Explorer: for Windows only

Slide Slide 99

Standard Toolbar– Contains Navigation buttons

Address Bar– Contains URL of Web page

Back & Forward Buttons– Take you to recently visited pages

Stop Button– Stops downloading

Refresh Button– Updates (refreshes) the pageHome Button– Returns to default start page

Search Button– Opens search engine program

Favorites Button– List of bookmarked Web pages

Media Button– Opens media player program

History Button– List of Web sites visited over a period of time

E-Mail Button– Opens e-mail program

Printer Button– Prints documents

Other Navigation Buttons

Program icon– Animates when downloading

Status bar– Messages about the browser’s operation

Hyperlinks

The Web Browser’s WindowThe Web Browser’s WindowClick to view the various parts of a Web browser’s window.

Other Web BrowsersOther Web Browsers Google Chrome: created by GoogleGoogle Chrome: created by Google

Mozilla Firefox: works on Mac & PCMozilla Firefox: works on Mac & PC

• The Internet is a global network providing direct The Internet is a global network providing direct access toaccess to computers worldwide.computers worldwide.

• Because of its cross-platform feature, computers of Because of its cross-platform feature, computers of all types can use the Internet.all types can use the Internet.

• Related information, in hypertext documents, is Related information, in hypertext documents, is referenced by linking to other documents.referenced by linking to other documents.

• The user’s Web browser is known as the client, and The user’s Web browser is known as the client, and the Web server retrieves documents requested by the Web server retrieves documents requested by the client.the client.

• A URL consists of the:A URL consists of the:ProtocolProtocolServerServerPathPathResource nameResource name

• Web pages are created using Hypertext Markup Web pages are created using Hypertext Markup Language (HTML).Language (HTML).

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• Online services are proprietary.Online services are proprietary.• Client software enables information to be Client software enables information to be

accessed, and server software delivers the accessed, and server software delivers the information.information.

• An Internet address uniquely identifies each An Internet address uniquely identifies each computer connected to the Internet.computer connected to the Internet.

• Intranets enable companies to set up internal Intranets enable companies to set up internal communications.communications.

• Popular Internet services include:Popular Internet services include:E-mailE-mailWorld Wide WebWorld Wide WebFTPFTPUsenetUsenetListservsListservsInstant messagingInstant messagingInternet Relay ChatInternet Relay ChatInternet telephonyInternet telephony

Slide Slide 1313

• You can improve search results by using inclusion You can improve search results by using inclusion operators, phrases, and Boolean operators.operators, phrases, and Boolean operators.

• Critically evaluate the author’s credentials and Critically evaluate the author’s credentials and purposes for publishing when reading Web pages.purposes for publishing when reading Web pages.