Transaction Protocol Data Unit

{{short description|Computer network protocol}}

The Transaction Protocol Data Unit (TPDU) is a packet-based protocol originally designed for financial transaction processing over an X.25 network.{{citation |title=TPDU - The Transaction Protocol Data Unit |url=https://www.eftlab.com/tpdu-the-transaction-protocol-data-unit/ |access-date=2021-03-26}}{{citation |title=TPDU Protocol |url=http://www.vanguardnetworks.com/Collateral/Documents/English-US/102_12.pdf |access-date=2019-05-06}}