datagram layer

例句：

1. 1. The datagram layer is responsible for the transmission of packets between different networks.
   数据报层负责不同网络之间包的传输。
2. 2.In the datagram layer, each packet contains a header and a payload.
   在数据报层，每个包包含一个头部和一个有效载荷。
3. 3. The datagram layer is crucial for ensuring reliable communication between devices.
   数据报层对于确保设备间可靠通信至关重要。