Comprehensive Explanation: The Transport layer (Layer 4) in the OSI model is responsible for end-to-end error checking, flow control, and reliable data transmission. It ensures that data is properly sequenced, without errors, and flow-controlled between the sender and receiver. Protocols such as TCP (Transmission Control Protocol) operate at this layer, providing mechanisms for retransmitting lost packets and maintaining the reliability of a session Huawei Support

The default Link Aggregation Control Protocol (LACP) system priority on Huawei switches is 32768. This priority helps determine which device takes the active role in link aggregation when multiple switches are involved. A lower value indicates a higher priority for managing the aggregated link.