|  | 11.1 | Routing Basics
| 11.1.3 | Network and host addressing
The router uses the network address to identify the destination network (LAN) of a packet within an internetwork. The graphic shows three network numbers identifying segments connected to the router. For some network layer protocols, this relationship is established by a network administrator who assigns network addresses according to a predetermined internetwork addressing plan. For other network layer protocols, assigning addresses is partially or completely dynamic. Most network protocol addressing schemes use some form of a host or node address. In the graphic, three hosts are shown sharing the network number 1. -