I'm been posting some QoS brain teasers to stimulate less experienced network engineers to think upon networking issues that generally, I believe, aren't typically well considered by standard networking education but which can easily very adversely i...

Say we're monitoring link bandwidth utilization. We have one link, at its busiest doesn't even peak above 5% utilization, and its average utilization is even less. Clearly, for this link, no bandwidth increase is warranted, correct? Conversely, we ha...

NB:  this is not an active issue, although it was a real issue.  I present this, for practical learning via discussion. A large business had lot of WAN links, across the Americas, that were p2p leased lines.  The were often either T1s or E1s, or frac...