User Data Protocol的用法和樣例：
例句
- A PDP context shall be activated before data can be transmitted or received for this PDP context.
在發送和接收數據之前必須激活對應的分組數據協議上下文。 - From practice, it concludes that data controlling mechanism of Netfilter can succeed in managing and filtering the whole data under Linux.
模塊可以實現對固定埠，網頁訪問以及不同數據協議類型的數據進行管理和控制。
