数据: data; record; information协议: agree on单元: unit; unit element; cell; lo ...协议数据单元: bpdu; llc pdullc; pdu protocol data unit; protocol data unit pdu; sscs-pdu sscs protocol data unit sscs表示协议数据单元: presentation protocol data unit (ppdu)操作协议数据单元: opdu operations protocol data unit; operation protocol data unit差错协议数据单元: er-pdu error protocol data unit传输协议数据单元: tpdu ---------transport protocol unit; tpdu tra ort protocol data unit; tpdu transport protocol data unit; transport protocol data unit传送协议数据单元: t-pdu transfer protocol data unit; tpdu transport protocol data unit对话协议数据单元: session protocol data unit更改协议数据单元: rd-pdu redirect protocol data unit会话协议数据单元: du se ion protocol data unit; sessionprotocoldataunitspdu; spdu session protocol data unit会晤协议数据单元: spdu session protocol data unit链路协议数据单元: lpdu link protocol data unit媒体协议数据单元: mpdu media protocol data unit桥接协议数据单元: bpdu bridge protocol data unit桥式协议数据单元: bpdu bridge protocol data units网络协议数据单元: npdu network protocol data unit网桥协议数据单元: bpdu bridge protocol data unit物理协议数据单元: phpdu physical protocol data unit消息协议数据单元: mpdu message protocol data unit协议数据单元错误: protocol data unit error应用协议数据单元: apdu a lication protocol data unit; apdu application protocol data unit; applicationprotocoldataunitapdu子网协议数据单元: snpdu subnetwork protocol data unit数据链路协议数据单元: dpdu data link protocol data unit