应用层

例句：

1. 1. The application layer is responsible for handling the communication between the user and the network protocols.
   应用层负责处理用户与网络协议之间的通信。
2. 2.In a cloud computing environment, the application layer is where applications are deployed and accessed.
   在云计算环境中，应用层是部署和访问应用程序的地方。
3. 3. The application layer provides a high-level interface to the underlying network layer, allowing applications to communicate with each other.
   应用层提供了一个高层接口到底层网络层，允许应用程序相互通信。