Feng Gang National Laboratory of Communication,UESTC Aug 2017 Ver 1.4 Drop Position Can drop a packet from head,tail,or random position in the queue Tail - easy default approach Head harder lets source detect loss earlier source destination Next packet dropped packet Previously served to arrive Creates "hole" packet ACKs 2616009:Network Traffic Engineering 5:Buffer Management Page.82616009: Network Traffic Engineering Feng Gang National Laboratory of Communication, UESTC Aug 2017 Ver 1.4 5: Buffer Management Page.8 Drop Position • Can drop a packet from head, tail, or random position in the queue • Tail - easy - default approach • Head - harder - lets source detect loss earlier . . . source destination Next packet to arrive dropped packet Creates “hole” Previously served packet ACKs