Wondering if someone could give a hint
From OReilly Cisco IOS Cookbook:
The main reason for using QoS in an IP network is to protect sensitive traffic in congested links.
In many cases, the best solution to the problem of congested links is simply to upgrade these links...
...how to handle the queuing when the links are congested
So my question is, does QOS only take place only when links are congested?
I mean if you have voice, video traffic and links are not congested you won't have problems?