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Stands for Internet Protocol Address of the IP address. Definition of IP address is a numerical identification that is labeled to a device such as a computer, router or printer contained in a computer network that uses the Internet protocol as a means of communication. IP address has two functions, namely:
As a means of identification in the host or network interface.
This function is illustrated as the person's name as a method to identify who the person is. in computer networks apply the same thing.
As the location address of the network.
This function is illustrated as our home address that shows exactly where we are. To facilitate the transmission of data packets, the IP address contains information of its existence. There is a service that must be passed so that the data can get to the destination computer.
IP address using 32-bit numbers. This system is known as Internet Protocol version 4 or IPv4. Currently IPv4 is still used despite existing IPv6 was introduced in 1995. This is due to the high growth in the number of computers connected to the internet. It is necessary to address more of being able to identify many members of the network.

IP address format

Addressing the actual IP address using binary numbers. However, in order to more easily written and read by humans, then the IP address is written with 4 decimal numbers, each separated by a dot. Writing format is called dotted-decimal notation. Each decimal number represents the value of an octet or eight bits of the IP address. An example is as follows:
192.168.1.1
If converted into binary numbers are as follows:
11000000.10101000.1.1
Which is easier to read?

IP address classes

The IP address of the originator of the network administrator to divide it into 5 classes, namely A, B, C, D and E. The difference in each class is size and number. A class IP used by a small network with a few members. Last row B and C. As for the D and E is the IP address for experimental purposes.

Network ID and Host ID

IP address above class divisions based on two things: the network ID and a host ID. Network ID is part of the IP address indicates the location of the computer network located. While the host ID shows a whole host TCP / IP to another in the network.