application level protocol

例句：

1. 1. The application layer protocol is crucial for ensuring data integrity and security.
   应用层协议对于确保数据完整性和安全性至关重要。
2. 2. In the application layer, different protocols are used to communicate between devices.
   在应用层，不同的协议被用于设备之间的通信。
3. 3. The application layer protocol defines the rules for how data is exchanged between two systems.
   应用层协议定义了两个系统之间数据交换的规则。