Register now or log in to join your professional community.
subnet mask is important to difine the network part of the ip address and using it will let me know if I will communicate with a device in the same network or on another network...if i'm communicating with a device in the same network then i don't need a default gate way but if i want to communicate with a device in another network i'll send the data to the default gatway to determine the next hobe using dynamic or static routing.
