Traffic Classes (cont’d)
A basic division: guaranteed (real-time) service and best-effort (elastic)
- like flying with reservation or standby
- utility is zero unless application gets a minimum level of service quality (bandwidth, delay, loss)
- open-loop flow control with admission control (goal is to lock sender and receiver into a common clocking regime)
- e.g. telephony, remote sensing, interactive multiplayer games
- closed-loop flow control with no admission control (willing to adapt to whatever QoS is available)