An IGRP interior route is defined as what?

An IGRP (Interior Gateway Routing Protocol) interior route is defined as a path to a directly attached, subnetted route. This is because IGRP operates as a distance-vector routing protocol, which is primarily used within an autonomous system to manage routing information among routers.

Directly attached routes are those that connect to a router's interfaces, and IGRP is specifically designed to handle these types of routes effectively. It can recognize and utilize subnetted networks and provide routing information that reflects the best path to these destinations based on metrics such as bandwidth, delay, and load.

Other options may include concepts related to routing but do not pertain to the specific nature of an IGRP interior route. For instance, paths to external networks generally refer to routes from different autonomous systems, while static routes are manually configured and do not rely on dynamic protocols like IGRP. Additionally, BGP (Border Gateway Protocol) relates to inter-domain routing rather than the IGRP's function of managing interior routes within a single domain. Therefore, understanding the characteristics of IGRP helps clarify why a path to a directly attached, subnetted route is the most accurate definition of an IGRP interior route.