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V. Liberatore
Pervasive Computing
QoS: from IP to data link
*QoS at data link
nE.g., priorities, token passing, VPN
nE.g., Ethernet
*QoS at IP
nProtocol
*IPv4: 4 basic Types-of-Service (ToS)
*IPv6: many flow ids, Classes-of-Service (CoS)
*QoS: from data link to IP
nCode-point mapping
nIP addresses