Figure 1-2. Ip Address Class Types - Bay Networks NauticaRS Reference Manual

NauticaRS 5.5R Reference Guide
1-12
The three main address classes are shown below, with the network
and host (node) sections of the address for each class.
Figure 1-2.
Class A addresses use an 8-bit network number and a 24-bit node
number. Class A addresses are in the range 001.xxx.xxx.xxx to
127.xxx.xxx.xxx (addresses 127.xxx.xxx.xxx are reserved and
cannot be assigned to networks or hosts).
Class B addresses use a 16-bit network number and a 16-bit node
number. Class B addresses are in the range 128.001.xxx.xxx to
191.254.xxx.xxx.
Class C addresses can have up to 254 hosts on a network. They
use a 24-bit network number and an 8-bit node number. Class C
addresses are in the range 192.000.000.xxx to 223.255.255.xxx.
Class D addresses are used for multicasts (messages sent to many
hosts). Class D addresses are in the range 224.000.000.001 to
239.255.255.254.
Class E addresses are for experimental use.
This addressing structure allows IP to uniquely identify each
physical network and each node on each physical network.
IP Address Class Types
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