Learning Outcomes 5

The importance of Internet and World Wide Web

What is internet?
The Internet is a global system of interconnected computer that use the standard Internet Protocol Suite (TCP/IP) to serve several billion users worldwide.

Usage of internet
$ Find general information / access information
$ Send (uploads) or receive (downloads) files between computers
$ Share resources
$ To correspond / meet with people
$ Shop for product and service

Services on the internet
- Communication (Electronic mail)
- World Wide Web
- Protocol
- Chart room 
- VIOP
- News group

(1) Internet service: Email
     It is allowed messages to be exchanged from computer to computer. The email program is used to create,send, receive, forward, store, print and delete email.
Examples: Yahoo, Gmail, MSN, Hotmail

(2) Internet service: The Web

     The web contain hypertext links, or highlighted keywords and images that lead to related information. A webs is organized using documents called web pages. A collection of linked Web pages that has a common theme or focus is called a Web site.

Uniform Resources Locator

URL is identified a Web pages exact Location, Web browsers.

There have four part addressing- scheme

1. Protocol

2. Domain Name

3. Path Name

4. file Name

What is hypertext markup language (HTML)?

Hypertext Markup Language (HTML) is the main markup language for creating web pages and other information that can be displayed in a web browser.

What/ Who is the internet service provider (ISP)?

A commercial organization that sells temporary connections to subscribers.

eg. Maxis Net, Celcom, Microsoft network, etc...

Client / server structure of the web

Web servers

Web servers are computers that deliver (serves up) web pages. Every Web server has an IP address and possibly a domain name. 

Web Client

Web client is the end user PC.

(3) Internet Service: Transfer Protocol

     The transfer protocol is the set of software that the computers use to move files from one computer to another on the internet. The most transfer protocol used on the Internet is the Hypertext Transfer Protocol (HTTP) and FTP.

(4) Internet Service: Chat Room

     Chat room is the channel, medium, location on internet that allow people to chat with each other.

e.g. Real chat, Yahoo Message Chat Room, AOL Chat Room

(5) Internet Service: VOIP

     Voice Over Internet Protocol (VOIP) or internet telephony is use internet to make phone call / video call. It allows user to speak to other user over internet.

e.g. Skype, Yahoo Voices, Windows Live call, NetMeeting.

(6) Internet Service: News group

     Electronic bulletin board conduct discussions about specific topic / subject. It include Newsreader (program use to access newsgroup like Google talk, Google group.)