bufferbloat
jargonnetworkingISP & telecom
Latency caused by oversized buffers: routers queue so much that packets arrive very late instead of being usefully dropped.
Big buffers were meant to prevent loss, but a full deep buffer means every packet waits in a long line - which is why one big upload can make video calls stutter. Smart queue management (CoDel, FQ-CoDel, CAKE) drains the bloat.