Wonder if someone could explain to me the advantage of the newer routing protocols sending their routing updates via multicast rather than broadcast? Is it just to lower the hit on everyone else on a broadcast multi access network?
Also, something else I'm not sure on, in RIP when the broadcasts are sent, are the broadcasts forwarded by the routers that recieve them? Same question with multicasts, eg OSPF? My feeling is the answer to RIP is no, they don't forward, and the reason why I'm thinking that is because RIp uses routing by rumour.... which would seem to suggest that OSPF etc DO forward the multicasts.
If anyone can clear up my obvious stupidities I'd be very greatfull!