last notes b4 the final!!!...its just around d crner..sooo nerbesss!
okeyh...as 4 diz week lcture's Dr.Dayang xplained bout the internet infrastructure.internet protocol(IP),internet access provider(IAP) and also HTTP.

internet infrastructure:

Infrastructure is the physical hardware used to interconnect computers and users-the transmission media, including telephone lines, cable television lines, and satellites and antennas, and also the routers, aggregators, repeaters, and other devices that control transmission paths.

internet protocol (IP) :

*IP is an address of a computer or other network device on a network.IP is the method or protocol by which data is sent from one computer to another on the Internet. Each computer (known as a host) on the Internet has at least one IP address that uniquely identifies it from all other computers on the Internet.
For example, the number "166.70.10.23" is an example of such an address. These addresses are similar to an addresses used on a house and is what allows data to reach the appropriate destination on a network.
 ip address:

• in two form- binary form (10011000.11011001.11101101.11110001)
                     -decimal form (166.70.10.23)
• consist of 4 octet
• each octet consist of 8 bits (4 octet X 8 bits = 32 bits/IP add)

 There are five classes of available IP ranges: Class A, Class B, Class C, Class D and Class E, while only A, B, and C are commonly used. Each class allows for a range of valid IP addresses.

Class	Address Range	Supports
Class A	1.0.0.1 to 126.255.255.254	Supports 16 million hosts on each of 127 networks.
Class B	128.1.0.1 to 191.255.255.254	Supports 65,000 hosts on each of 16,000 networks.
Class C	192.0.1.1 to 223.255.254.254	Supports 254 hosts on each of 2 million networks.
Class D	224.0.0.0 to 239.255.255.255	Reserved for multicast groups.
Class E	240.0.0.0 to 254.255.255.254	Reserved for future use, or Research and Development Purposes.

internet access provider:

In order to connect to the Internet, you need an IAP. It is the company that you (or your parents) pay a monthly fee to in order to use the Internet. If you use a dial-up modem to connect to your IAP, a point-to-point protocol (PPP) connection is established with another modem on the IAP's end. That modem connects to one of the IAP's routers, which routes you to the Internet "backbone." From there, you can access information from anywhere around the world. DSL and cable modems work the same way, except after you connect the first time, you are always connected.

*time,unifi,jaring,streamyx,tm.net,maxis,celcom are the examples of internet access provider that are available in our country.

HTTP:

HTTP (HyperText Transfer Protocol) defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.


*URL in internet browser >  HTTP command >  web server > web page