One other dimension to think of Traffic Management - Signaling
congestion is a signal whether packet loss or ECN
price is a signal, whether per session/flow, or per day/month year
users demand is a signal - whether sending VBR video or rate adaptive TCP or QUIC traffic - the rates and duration (or file sizes) tell the network provider what to provision for,,,
aggregate demand (e.g. peering traffic or customer provider traffic) is a signal
so even without deploying an explicit signaling protocol (e.g. like RsVP) there is a lot of meta-data telling stakeholders what is affordable and what to be afforded.
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