Web Programming

Lecture # 01

Internet

• Network of networks that consists of millions of private & public, academic, business and Government networks.

Web• Is a distributed information system • Information in the web is connected by Hyperlinks.

World Wide Web

• Is a system of interlinked hypertext documents documents via the internet.

Hypertext• Is a text, displayed on a computer with references to other text that

the reader can immediately access, usually by a mouse click or key press sequence. OR

• Or a method of presenting information where selected word in online text can be expanded into more information

Web Page• Is a document on the internet• Web Site is a collection of web pages.

Web Browser• Is a computer program tou use to retrieve

and view web pages. E.g. IE, NetScape

Web Server• A computer program that is responsible for accepting HTTP

requests from clients • The computer on which such software runs is known as web server

Protocol• is a set of rules which is used by computers to communicate with

each other across a network. A protocol is a convention or standard that controls or enables the connection, communication, and data transfer between computing endpoints.

HTTP• hypertext transfer protocol: a protocol

(utilizing TCP) to transfer hypertext requests and information between servers and browsers

TCP/IP• TCP (Transmission Control Protocol) operates at a higher level,

concerned only with the two end systems, for example a Web browser and a Web server.

• Whereas IP(Internet Protocol) handles lower-level transmissions from computer to computer as a message makes its way across the Interne