TCP/IP Addressing Every IP address can be broken down into 2 parts, the Network ID (netid) and the Host ID (hostid). All hosts on the same network must have the same netid. Each of these hosts must have a hostid that is unique in relation to the netid.
Subnetting A subnet mask blocks out a portion of an IP address and is used to differentiate between the hostid and netid. The default subnet masks are as follows: ...
