KELAS MINGGU KESEBELAS

Pada minggu kesebelas kelas Dr. Johari, sebelum memulakan sesi Pengajaran & Pembelajaran (P&P), Dr. Johari telah melakukan MID-TEST mengenai kesemua Bab yang telah dipelajari sebelumnya daripada minggu pertama hingga minggu kelapan yang telah diajar oleh pensyarah Dr. Norasyikin. Ujian telah mengambil masa selama 1jam. Kemudiannya, barulah Dr. Johari memulakan kuliah yang bertajuk Internet Infrastructure.

What is internet....?????

• A global collection of network

• Interconnected computers work by transmitting data through a special type of packet

   switching which is known as the IP (internet protocol).

• When you connect to the Internet, your computer becomes part of a network.

Internet VS WWW...?????

- The Internet is not synonymous with World Wide Web. 

- The Internet is a massive network of networks, a networking infrastructure. It connects

   millions of computers together globally, forming a network in which any computer can

   communicate with any other computer as long as they are both connected to the Internet. 

- The World Wide Web, or simply Web, is a way of accessing information over the medium

   of the Internet. It is an information-sharing model that is built on top of the Internet.

A Hierarchy of Networks :

•From a single computer to LAN

•From LAN to ISP

•ISP to WWW

Internet service provider (ISP) :

•ISP Also called IAP (Internet Access Provider).

•Company that provides access to the internet.

•Usually ISP provide software package, username, password and access phone number and modem

•ISP are connected to one another through Network Access Points (NAPs)

•Example of ISP : TM

Internet Protocol :

•Every machine on the Internet has a unique identifying number, called an IP Address.

•The IP stands for Internet Protocol, which is the language that computers use to communicate over the Internet.

•A protocol is the pre-defined way that someone who wants to use a service talks with that service. The "someone" could be a person, but more often it is a computer program like a Web browser. 

An IP address consist of 32 bits, often shown as 4 octets of numbers from 0-255

161.139.52.254

161  : Area or location of network (eg. UTM)

139  : Server no

52  : Division/unit no (FP, FKM etc)

254  : Computer no 

HTTP :

•Hyper Text Transfer Protocol

•HTTP defines how messages are formatted and transmitted and what actions Web servers and browsers should take in response to various command

•For example, when you enter a URL in browser, this actually send an HTTP command to the web server directing it to fetch and transmit the requested page. 

6 type of internet connection and access :

1. Dial Connection

2. Cable

3. Satellite internet access

4. Fixed wireless

5. Broadband

6. Mobile wireless