newsgroup world wide web (www) conservation over the internet e.g.icq file transfer protocol (ftp)...

Newsgroup World Wide Web (WWW)

Conservation Over the Internet e.g.ICQ

File Transfer Protocol (FTP)

Includes 6 main services:

Electronic Mail

Remote logon

World Wide Web (WWW)World Wide Web (WWW)

A system that enable users to find and retrieve information by navigating through linked hypertext documents

NewsgroupNewsgroup

It is a discussion group that allows people with common interests to communicate with each other.

Computers have to connect to newsgroup servers in order to download news.

Electronic MailElectronic Mail

It can exchange E-mail on a network

It is a fast and convenient way to exchange ideas and request information

You can attach files in E-mail, forward to other readers …

File Transfer Protocol (FTP)File Transfer Protocol (FTP)

To copy files (e.g. HTML files) from one computer to another on the internet

Download (From Server to Home PC) files

Upload (From Home PC to Server)

Conversation over the Internet Conversation over the Internet (Chat) - e.g.ICQ, internet phone(Chat) - e.g.ICQ, internet phone

You can instantly communicate with people around the world by typing back and forth

When chatting, the text you typed immediately appears on the screen of each person involved in the conversations

Remote logon (Telnet) Remote logon (Telnet)

You can logon a host computer remotely through the Internet, and the computer will act as a terminal for the computer host (e.g. UNIX systems).

You can do some operations or commands to remote control the host system.

E.g. Run a program.

Host Computer

Terminal