PDU的用法

the data unit that is integrity protected is the pdu header and the data part of the pdu before ciphering.

完整性保护的数据单元是加密之前的PDU头和PDU的数据部分。

Firstly, some theories and protocols about SNMP network management are introduced in paper, include SMI ( Structure of Management Information), MIB ( Management Information Base), protocol operations and definition formats of PDU ( Protocol Data Unit).

首先，论文对SNMP网络管理的基础理论及协议规范做了必要的介绍，包括管理信息结构、管理信息库、协议操作过程和具体的协议数据单元的定义格式。

Finally, this paper focus on the crucial technique of The implement of mobile telephone short message in Library& the transfers technique of using computer dispatch the mobile telephone short message: connection method 、 transfers method 、 PDU format.

最后重点介绍了实现图书馆短消息服务的关键技术&用计算机进行短消息的收发技术：连接方法，收发方法，PDU模式。