Technology of Stateful Inspection is mainly checking a part of stateful flag of IP step or TCP step, and decide whether let a data packet pass.
状态检测技术主要是通过对IP层或TCP层的部分状态标志进行检测，来决定是拒绝还是允许数据包通过。
Stateful inspection: a newer method that doesn't examine the contents of each packet but instead compares certain key parts of the packet to a database of trusted information.
状态检查：一种更新的方法，并不检查每个数据包的内容，而是将数据包的某个关键部分与一个可信的信息数据库比较。
Stateful inspection: a newer method that doesn't examine the contents of each packet but instead compares certain key parts of the packet to a database of trusted information.
状态检查：一种更新的方法，并不检查每个数据包的内容，而是将数据包的某个关键部分与一个可信的信息数据库比较。
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