 In traditional "next-hop routing", a packet is routed according to its destination only, towards the closest router that announces a route that matches that destination.Consider a multihomed end-user network connected to two ISPs, BT&T and PacketCast; such a network will typically have two "edge routers", each of which is connected to one ISP.Both edge routers announce a default route, meaning that they are willing to accept packets destined for the Internet.