| The network ID portion can take only the predefined number of bits 8, 16 or 24. |
Any number of bits be assigned to the network ID. |
| Enable the use of IP address with same subnet masks in the same network. |
Enable the use of IP address with different subnet masks in the same network. |
| Address have 3 paths network, subnet & host. |
Address have 2 paths prefix & host. |
| Does not advertise masks not support VLSM, RIP-1 and IGRP. |
Does advertise masks & support VLSM, RIP2, EIGRP and OSPF. |
| IP forwarding process is restricted in how it uses the default route. |
IP forwarding process has no restricted in how it uses the default route. |
