|  | 12.2 | Interior and Exterior Routing Protocols
| 12.2.4 | IP routing configuration tasks
The selection of an IP routing protocol involves the setting of both global and interface parameters. Global tasks include selecting a routing protocol, either RIP or IGRP; and indicating IP network numbers with specifying subnet values. The interface task is to assign network/subnet addresses and the appropriate subnet mask. Dynamic routing uses broadcasts and multicasts to communicate with other routers. The routing metric helps routers find the best path to each network or subnet.