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Configuring TCP/IP

Let us look more closely at TCP/IP. Firstly let us look at the IP v4 Address format. This format is made up of four groups of decimal numbers, each ranging from 0 to 255 (apart from the first group that has the range 1 to 223). The address is actually stored as four 8-bit bytes, each byte being one of the decimal numbers. The address is made up of two parts - the network address and the host address. For computers to communicate directly with each other, they must belong to the same network and have the same network address. A router will allow computers on different network address to communicate, albeit indirectly. To identify which part of the full IP address is the network and which is the computer, the subnet mask is used.

Example

IP address 192.168.102.100

Subnet Mask 255.255.255.0

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