IP Address?

RHochstenbach

The IP address is divided between a Network Id and Host ID. The Network ID gives a unique number to the network. The Host ID gives a unique number to a computer in the network. It's easy to see the difference between both IDs. Look at the first number. I'll show the Network ID in bold.

1-127
xxx.xxx.xxx.xxx (class A)

128-191
xxx.xxx.xxx.xxx (class B)

192-223
xxx.xxx.xxx.xxx (class C)

Example:
Let's take the IP address 109.23.00.3.
109 sits between 1-127, so 109 is the network ID. 23.00.3 is the Host ID. If you got a computer with that address, and want to add another computer, you need to start with 109, so it belongs to that network. The other 3 numbers can be anything of your choice.

Another example would be the address 130.27.80.50. 130 sits between 128-191, so the Network ID is 130.27. And the host ID would then be 80.50.

The higher the class (A, B or C), the more different networks you can create, but at the cost of less computers for each network.

More information can be found here.

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