Over-provisioning – is it possible?
[CASNER] – “not every week is like this”
Over-provisioning is not always possible and at times congestion maybe unavoidable
Capacity planning failures
Unexpected traffic demands
Network failure situations
Bandwidth unavailability
TCP has a habit of eating “abundant” bandwidth
In these cases there is no differentiation between premium and best effort services
e.g. in congestion VoIP degrades