olemus
pakettide otspunktidevaheliste hilistuste erinevus
= the difference in end-to-end one-way delay between a selected packet an a reference packet

ülevaateid
https://en.wikipedia.org/wiki/Packet_delay_variation

https://tools.ietf.org/html/rfc3393

https://datatracker.ietf.org/doc/html/rfc5481