Another node on the same network segment might be numbered 21, and so on. Networks and the nodes on them are separate entities, with separate numbers. Figure B . Each node on a network is numbered uniquely, and each network on the Internet is also numbered uniquely. This provides a unique 32-bit address for each device on the Internet.
Routers perform the task of moving traffic between networks.
A node that needs to send data to another node on another network will send the data to a router, and the router will then send the data on to the destination node. If the destination isn't on an directly-connected network, the router will send the data to another router for delivery. For more information about 32-bit addressing, refer to section 1 Binary Addresses, Octets and Network Classes . For more information on address availability, refer to section 2 Addressing Limitations and section 3 Internet-Legal versus Private Addressing . For information on how to allocate addresses, refer to section 4 Sub-Net Masks .