This issue is a bit difficult and deservs more points but I'll try it a shot with my remaining points and will increase them when I get some points refunded..
We're planning to implement a corporate web site that will take lots of traffic and we need to estimate how much bandwith allocation is needed for optimal/stable performance, is there a tool/way to calculate such things? roughly? I know it's difficult since the bandwith will be shared by all concurrent users packets and a banwith upgrade need can be detected by slow site downloads.. how can such thing be simulated? I checked stress test tool.. it's reporting back the average response time of the targetted page.. but this is marginised since the site is tested from severeal client machines and doesn't reflect fully the production environnement.. anyways.. I'm ready for comments and collegue experience in such topic.