Signamax 065-7840 24-Port 10/100/1000BaseT/TX Managed Switch
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Classful addressing divides the IP address into three classes, class A, class
B and class C. The rest of the 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 that
can be defined, because the address 0.0.0.0 is reserved for the default route and
127.0.0.0/8 is reserved for the loopback function.
0
Class B:
IP addresses range between 128.0.0.0 and 191.255.255.255. Each class B
network has a 16-bit network prefix followed by a 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
Class C:
IP addresses range between 192.0.0.0 and 223.255.255.255. Each class C
network has a 24-bit network prefix followed by an 8-bit host address. There are
2,097,152 (2^21)/24 networks able to be defined with a maximum of 254 (2^8 –2)
hosts per network.
110
Bit # 0 1 7 8 31
Network address Host address
Bit # 01 2 15 16 31
Network address Host address
Bit # 0 1 2 3 23 24 31
Network address Host address
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