one dot for each measurement. Another type are distribution histograms which are more useful for bigger datasets or even comparisons of different paths or technologies. Limiting PDV or its effects For interactive real-time applications, e.g., voice over IP (VoIP), PDV can be a serious issue and hence VoIP transmissions may need quality of service-enabled networks to provide a high quality channel. The effects of PDV in multimedia streams can be mitigated by a properly sized buffer at the receiver. As long as the bandwidth can support the stream, and the buffer size is sufficient, buffering only causes a detectable delay before the start of media playback. See also Latency (engineering) References Network architecture