world wide web
TRANSCRIPT
Index
What is internetWhat is internet History of internetHistory of internet
What are some services found on the Internet
What are some services found on the Internet Who controls internetWho controls internet
What is world wide webWhat is world wide web
Portals Portals
History of world wide webHistory of world wide web
Search engines Search engines
Web browserWeb browser Hyperlinks Hyperlinks
A global computer network providing a variety of information and communication facilities, consisting of interconnected networks using
standardized communication protocols.
What is INTERNET???
History of the InternetHow did the Internet originate?
Goal:To function if
part of network were disabled
Became functional
September 1969
ARPANET
Networking project by Pentagon’s Advanced
Research Projects Agency (ARPA)Goal:
To allow scientists at different
locations to share information
History of the InternetHow has the Internet grown?
p. 9
TodayMore than 500 million host nodes
1984More than 1,000 host nodes
1969Four host nodes
• E-Commerce
• Social Media
• Unlimited information
• Making presentations(Just like this one !)
• World Wide Web(WWW)
Some of the Services
World Wide Web Consortium (W3C) Oversees research, sets standards and guidelines
Mission is to contribute to the growth of the Web
Nearly 400 organizations around the world are members of the W3C
Who controls the Internet? No one—cit is a public, cooperative, and
independent network Several organizations set standards
A worldwide collection of electronic documents
Each electronic document is called a Web page
Also called the Web
Can contain text, graphics, audio, video, and built-in connections
A Web site is a collection of related Web pages
What is the World Wide Web (WWW)?
The term WWW refers to the World Wide Web or simply the Web.
The World Wide Web consists of all the public Web sites connected to the Internet worldwide, including the client devices that access Web content.
The WWW is just one of many applications of the Internet and computer
What is the World Wide Web (WWW)?
• Founded by - Tim Berners-Lee at the European Laboratory for Particle Physics(CERN).
• He developed a software application for a hypertext server program which stores documents and makes it available on the internet
• Which he named as WORLD WIDE WEB.
• Developed To- try to improve the CERN’s research document handling and sharing mechanism.
History of WWW
• In 1993, Marc Andreessen wrote a program named ‘mosaic ‘ which could read the documents in hypertext format
• Which was later named as “WEB BROWSER”
• Because of web browser people could easily access internet.
• It was a free software.
• “NETSCAPE NAVIGATOR” was the first web browser ,which was based on mosiac.
History of WWW
A web portal is most often one specially
designed Web page which brings
information together from diverse
sources in a uniform way.
Usually, each information source gets
its dedicated area on the page for
displaying information.
Portals
A program that searches for and identifies
items in a database that correspond to
keywords or characters specified by the
user, used especially for finding particular
sites on the World Wide Web.
Search engine
• A web server is a program running on a server computer .it consist of the website containing a no. of web pages.
• Web pages are designed on a language called HTML.
• Each web page can contain text , graphics, sound, video and animation .
Web server
• The web server receives request for a web page from a browser program running on the client.
• Then it locates that the corresponding page and sends it to the client computer.
• In this TCP connection the client sends one request and the server ine response.
• This request –response model is governed by a protocol called HYPERTEXT TRASFER PROTOCOL(HTTP).
• The most popular web servers are Apache , IIS.
Working of web server
A web browser (commonly referred to as a browser) is a software application for retrieving, presenting and traversing information resources on the World Wide Web.
An information resource is identified by a Uniform Resource Identifier (URI/URL) and may be a web page, image, video or other piece of content.
Web browser
Working of a Web browser
Step 1.Click the Web browser program name
Step 2.Web browser looks up the home page setting
Step 3.The Web browser communicates with the access provider’s server to retrieve the IP address. The IP address is sent to your computer.
Step 4.The home page displays in the Web browser
A uniform resource identifier (URI) is a string of characters used to identify a name of a resource. Such identification enables interaction with representations of the resource over a network, typically the World Wide Web, using specific protocols.
URI/URL
A hyperlink is a reference to data that the reader can directly follow either by clicking or by hovering. A hyperlink points to a whole document or to a specific element within a document. Hypertext is text with hyperlinks.
Hyperlink
Internet vs WWWInternet World Wide Web
Estimated year of Origin 1969, though opening of the network to commercial interests began only in 1988
1991
Name of the first version ARPANET NSFnet
Comprises Network of Computers, copper wires, fibre-optic cables & wireless networks
Files, folders & documents stored in various computers
Governed by Internet Protocol Hyper Text Transfer Protocol
Dependency This is the base, independent of the World Wide Web
It depends on Internet to work
Nature Hardware Software