Names of data packets at different layers of OSI model

Following image shows seven layers of OSI reference model.

OSI model has the name Protocol Data Unit (PDU) for data packets at different layers of OSI model. Protocol Data Unit (PDU) of a layer contains the data from upper layers of OSI model and header (also a trailer at Datalink layer) of that layer.

Following image shows the PDUs at different layers of OSI model.