Date Added: Dec 2009
Ad hoc networks are autonomous systems composed of mobile hosts that are free to move around arbitrarily. Rather than relying on a network infrastructure to perform routing in an Mobile Ad hoc NETwork (MANET) each mobile host serves as a router to forward packets originated from other nodes. Proactive protocols are table driven, find routes between all source-destination pairs regardless of the actual need for such routes. Reactive protocols, on the other hand, are based on the reduction of the routing load by initiating new routing activities only in the presence of data packets in need of a route.