IETF IntServ Traffic Classes

• Based on sensitivity to delay

• Guaranteed

- intolerant: typically non-adaptive, e.g. telephony/interactive voice with fixed playback point

- tolerant: typically adaptive, e.g. adaptive playback audio- or video-streaming application minimizing offset delay ==> less delay, but higher loss rate

• Best-effort

- interactive burst (e.g. paging, messaging, email)

- interactive bulk (e.g. ftp)

- asynchronous bulk (e.g. net news, junk traffic)

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