EntityQ1758093· pop 9· linked from 16 articlesService data unitSign in to savedata passed down to a lower layer of the OSI model, yet to be encapsulatedConnectionsOSI modelEntityProtocol data unitEntitytelecommunicationsEntitycomputer networkEntityphysical layerEntitymedium access controlEntitypayloadEntitymaximum transmission unitEntityheaderEntityencapsulationEntityIP fragmentationEntityFederal Standard 1037CEntityPacket segmentationEntitytrailerEntityCategoriesTelecommunications standards