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method for easily linking content contained on computer systems distributed
throughout the world and connected to the Internet. Utilizing the Web, content
on servers from many locations can be seamlessly linked and presented as a
comprehensive resource collection. The Web further strengthens the power of the
Internet's foundation of distributed computing.
The Web and the Internet remained the world's best-hidden resource until 1993
when Marc Andreessen, an undergraduate at the University of Illinois in
Champaign, and a team at the National Center for Supercomputing Applications
(NCSA) created the NCSA Mosaic browser. The NCSA Mosaic browser was the
first Web-browser client that provided a friendly, point-and-click method for
navigating the Internet using the Web.
The invention of the NCSA Mosaic browser was the start of the unprecedented
growth of Internet users, Internet service providers (ISPs), and Internet business
opportunities. By means of a user-friendly approach to searching and viewing the
vast amount of information on the Internet, the Web-browser client enabled
nontechnical individuals to benefit from the power and resources of the Internet.
Accessing content through the Web consists of communication between a Web-
browser client and a Web server utilizing HTTP (see
Figure 1
).
Figure 1. Web Overview
The following is a step-by-step description of the communication path, as shown
in
Figure 1
. It assumes that the Web server, the primary domain naming system
(DNS) server, and the client computer are connected to the Internet and that all
communication is conducted through the Internet.
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