Some colleagues are discussing QoS, and are interested in jitter. What is jitter?

• Jitter refers to the variation in delay experienced by packets
• Jitter is a flickering effect sometimes seen on streaming video.
• Jitter is a predefined settings package that provides optimal QoS for IP telephony use.
• Jitter is a clicking noise that can be heard on some VoIP calls. It is caused by loss of UDP packets.