DSR Optimizations
	n Route cache – organized as tree – route discovery also learns about routes to intermediate nodes – intermediate nodes learn about routes by “snooping” on route request/reply messages and/or routing data – intermediate nodes may learn routes by listening to route discovery through neighboring nodes – use route cache to reply to route requests, even if not target node n multiple hosts can answer with different routes: how to pick best route/suppress transmission of additional replies? n possibility for routing loops: node that replies with route from cache has to check for loops before replying – limit hop count for route requests