PDU (protocol data unit) : the initiator and target divide their communications into messages. The term "iSCSI protocol data unit" (iSCSI PDU) is used for these messages.

协议数据单元。启动设备和目标设备分割他们的通讯到消息中。

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In a typical distributed interaction environment, environment information dynamic update is based on Protocol Data Unit (PDU), which does not guarantee reliable message transfer.

在典型的分布式交互环境中，环境信息动态更新是基于协议数据单元(PDU)，它不提供数据可靠性传输保证。

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