Old-style classes of IP addresses
Different classes used to represent different sizes of network (small, medium, large)
Class A networks (large):
- 8 bits network, 24 bits host (/8, 255.0.0.0)
- First byte in range 0-127
Class B networks (medium):
- 16 bits network, 16 bits host (/16 ,255.255.0.0)
- First byte in range 128-191
Class C networks (small):
- 24 bits network, 8 bits host (/24, 255.255.255.0)
- First byte in range 192-223