N-GEN
Communications Web-based Seminars ©NGCS
Seminar - An Overview of Communications Technologies
Seminar - An Overview of Communications Technologies
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Module 6 - Internet, Intranet, Extranet, e-Commerce and Web Services Slide 7 of 70 _________________ __________ How Does the Internet Work?
_________________ __________ Originally the Internet was developed with the idea of providing a means for transferring information and using remote computer resources. Today, there are millions of personal and commercial sites providing information, allowing upload and download of files, electronic mail to communicate with anyone who is connected to the Internet and many other services. A user (equipped with a browser) makes a request to a server for information by using appropriate protocol (HTTP protocol used to carry the World Wide Web traffic between a WWW browser - Netscape or Microsoft Explorer) and the WWW sever being accessed. The connection-orientated protocol (HTTP, FTP etc.) traffic is transported from a user to a server via TCP/IP protocol. Unique Identification - Each device (a user computer or a server) connected to the Internet is given a unique address. No two devices will have the same address. Internet Services - The Internet network is a means of providing services ranging from e-mail, the WWW to recreational services like on-line games. Connection-Orientated Protocols - Each Internet service has its own connection-orientated protocol to carry traffic from a browser (equipped with the service client) to the service specific servers. HTTP, FTP and Telnet are examples of connection-orientated protocols. Internet Communications Protocol - TCP/IP protocol is used to transport the connection-orientated protocol traffic through the Internet network.
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Unique
Identification of Devices Connected
