Waters Network Systems
2800M/MR User’s Manual
Page 18
network identifier identifies the network on which the host resides, while the host identifier
identifies the particular host on the given network. The host identifier must be unique in the
same LAN. Each class has its own network range between the network identifier and host
identifier in the 32 bits address. IP address is known as IPv4.
Network identifier
Host identifier
With “classful” addressing, the IP address is divided into three classes: class A, class B and
class C. The rest of IP addresses are for multicast and broadcast. The bit length of the network
prefix is the same as that of the subnet mask and is denoted as IP address/X, for example,
192.168.1.0/24. Each class has its address range described below.
Class A:
Address is less than 126.255.255.255. There are a total of 126 networks can be defined
because the address 0.0.0.0 is reserved for default route and 127.0.0.0/8 is reserved for
loopback function.
0
Class B:
IP address range between 128.0.0.0 and 191.255.255.255. Each class B network has a 16-bit
network prefix followed 16-bit host address. There are 16,384 (2^14)/16 networks able to be
defined with a maximum of 65534 (2^16 –2) hosts per network.
10
32 bits
Bit # 0 1 7 8 31
Network address Host address
Bit # 01 2 15 16 31
Network address Host address
