Network Sales and Services Handbook (Cisco Press Networking Technology)
The following topics are covered in this chapter:
WWW
URL
Internet Programming Languages
Peering
The Internet is a computer network made up of thousands of such computer networks worldwide, with each computer communicating by using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite.
In addition to using TCP/IP for communication, these Internet computers use client/server architecture, meaning that the server provides files and services to the end-user client, as illustrated in Figure 20-1.
Figure 20-1. Client/Server Architecture
When a user views a web page, the web browser (client) requests information from the web server, which in turn fulfills the request by sending the web page back to the web browser.
An Internet user can access a variety of services, such as electronic mail (e-mail), file transfer/sharing, information resources, interest group membership, interactive collaboration, multimedia displays, real-time broadcasting, electronic commerce (e-commerce), news and current events, and so on. The most common Internet service is the World Wide Web (WWW).