Intrenet and its uses
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Transcript of Intrenet and its uses
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).
Slide Slide 1212
• 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.