INTERNET INFRASTRUCTURE

INTERNET : Interconnected computer work by transmitting data through a special type of packet
                        switching which is known as Internet Protocol (IP).

Internet vs World Wide Web (WWW) ⇒ accessing information over the medium of the internet
     ⇓
- connects millions of computers together globally
- forming a network: any computer can communicate with any other computer

Hierarchy of Network

• From single computer to LAN
• From LAN to ISP (Internet Service Provider)
• From ISP to WWW

* ISP also known as IAP (Internet Access Provider)

* example of ISP: TM

Internet Protocol (IP Address)

- unique identifying number in every machine on the internet

- language that computers used to communicate over the internet

- normally expressed in decimal format to make easier to remember

  e.g: 216.27.61.137

 216: area or location of network (e.g: UTM)

   27: server no.

   61: division or unit no. (e.g: FP)

 137: computer no.

Domain Name System

HTTP (Hyper Text Transfer Protocol) : defines how messages are formatted and transmitted and 

                                                                    what actions Web servers and browsers should take in 

                                                                    response to various command

Type of Internet Connection and Access

• Dial Connection - used with home computers
• Cable - used a direct connection (e.g: office)
• Satellite Internet Access - required transceiver satellite to receive and transmit data
• Fixed Wireless - used in radio transmission tower (same as satellite internet)
• Broadband - transmits data digitally, modem or similar device required to translate data                                  packages
• Mobile Wireless - virtually anywhere cellular phone service available