Applications of a QoS Network
Real-time: voice, video, emergency control, stock quotes ...
Non-real-time (or best-effort): telnet, ftp, …
- hard with deterministic or guaranteed QoS: no loss, packet delay less than deadline, difference in delays of 2 packets less than jitter bound, …
Note: reducing jitter reduces buffers needed to absorb delay variation at receiving host
- soft with statistical or probabilistic QoS: no more than x% of packets lost or experience delay greater than deadline, …
Best-effort do not have such timing constraints