1. Classified by geographic coverage of the network:
Wide area network (wide range, small bandwidth)
Metropolitan area network (moderate range, moderate bandwidth)
Local area network (small range, large bandwidth)
2. Classified by network topology:
Bus type, star type , ring type, tree type, mesh type (complete type)
3. Classified according to the transmission medium used:
Coaxial cable, twisted pair (network cable) , optical fiber , wireless , satellite