Q

Q2931b protocol, 725

QoS. See quality of service

QQ, 680

quality of service (QoS)

• call admission, 724

• in 4G, 558

• per-connection guarantees, 710, 723–726

• resource reservation, 725

• RTP and, 701

• traffic policing and, 717

quantization, 678

query

• ARP, 472, 503

• DNS chain, 133–134

• DNS message, 503

queueing delays, 24–25, 35, 36, 39–41

• network congestion and, 263

queuing

• FIFO, 325–326

• input, 322

• line speed and, 321–322

• non-preemptive priority, 327

• output, 323–324

• priority, 325, 326–328

• round-robin, 325, 328–329

• in routers, 321–325

• traffic load and, 322

• transmission rate and, 321–322

• WFQ, 328–329

• work-conserving, 327, 328

QUIC protocol, 202, 203, 285