23
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