olemus
kahesuunalise edastuse meetod OSI võrgukihis:
kviteering ACK saadetakse koos andmetega
= a method of two-way communication that uses attaching acknowledgment to the outgoing data packet

ülevaateid
https://en.wikipedia.org/wiki/Piggybacking_(data_transmission)

https://www.cspsprotocol.com/what-is-piggybacking/

https://afteracademy.com/blog/what-is-piggybacking