Internet's Area Hierarchy What is an autonomous System (As)? *a set of routers under a single technical administration Using an interior gateway protocol( GP)and common metrics to route packets within the as Using an exterior gateway protocol(EGP)to route packets to other AS's Sometimes AS's use multiple iGPs and metrics but appear as single as's to other Ass k Each as assigned unique ID AS's peer exchanges information 2021/1/31Internet’s Area Hierarchy  What is an Autonomous System (AS)?  A set of routers under a single technical administration  Using an interior gateway protocol (IGP) and common metrics to route packets within the AS  Using an exterior gateway protocol (EGP) to route packets to other AS’s  Sometimes AS’s use multiple IGPs and metrics, but appear as single AS’s to other AS’s  Each AS assigned unique ID  AS’s peer exchanges information 2021/1/31 10