Technology - The Internet Past, Present and Future
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TCP/IP
The Internet is based on a family of protocols called TCP/IP - Transmission Control Protocol/Internet Protocol. Each protocol is responsible for a specific task.
File Transfer - The File Transfer protocol allows a user on one computer to get files from another computer.
Computer Mail - Allows you to send messages to users on other computers.
Remote Login - Allows a user from one computer to log in to another computer.
World Wide Web - Allows you to access hypertext information from a server.
Many of the protocols are implemented as client/server models of network services. The client software requests services from the server software. The term "server" normally refers to the server software.
World Wide Web
Developed by TBL of CERN, the World Wide Web (based on HTTP – Hyper Text Transport Protocol) is one of the most popular applications on the Internet. The Web is based on the client/server model. The client (Netscape, Explorer, Mosaic) establishes a connection to a server via a URL (Uniform Resource Locator). A URL is a naming scheme for specifying how and where to find information from Internet servers such as Web, Gopher and FTP. The general form of a URL is: protocol: //host-name:port/directory/filename. The server accepts the connection and sends the requested information back to the client. The server then closes the connection. The data stored on the Web server is normally in HTML – Hyper Text Markup Language.
Internet Today
Problems
The rapid growth and interest has introduced or amplified many problems:
Security concerns for commercial applications,
Bandwidth and server saturation,
- Demand for faster access to multimedia data,
Not enough IP addresses to meet the demands,
Controlling access to certain types of data,
- Protecting the work of authors - copyright issues.
Factors Affecting Growth
It is estimated that the Internet doubles in size every I I months and the World Wide Web doubles every 53 days. Commercial use of the Internet for Sales, Advertising and Marketing is being considered by most companies. Newer applications, cheaper and faster computers and modems, and connections via cable TV lines are bringing Internet connectivity to households. The planned introduction of the Network Computer (NC) by major manufacturers and the wide range of information available are also contributing to the growth and interest.