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GFK-1852 A-1
IP Addresses
IP Addressing
An IP address is a 32-bit value, divided into four octets of eight bits each. The
standard representation is four decimal numbers (in the range of 0..255), divided by
dots.
Example: 192.2.1.123
This is called decimal-dot notation.
The IP address is divided in two parts: network and host. To support different needs,
three ”network classes” have been defined. Depending on the network class, the last
one, two or three bytes define the host, while the remaining part defines the network.
In the following, ‘x’ stands for the host part of the IP address:
Class A Network
IP address 1.x.x.x to 127.x.x.x
Only 127 different networks of this class exist. These have a very large number of
potential connected devices (up to 16,777,216)
Example: 10.0.0.1, (network 10, host 0.0.1)
Class B Network
IP address 128.0.x.x to 191.255.xxx.xxx
These networks are used for large company networks. Every network can consist of
up to 65,534 devices.
Example: 172.1.3.2 (network 172.1, host 3.2)
Appendix
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