A method of data transmission includes establishing a buffer for TCP/IP data packets, receiving and buffering the TCP/IP data packets including TCP payloads and TCP ACKs. A queue of the buffered TCP/IP data is adjusted in accordance with header information of the TCP/IP data packets. The buffered TCP/IP data packets are transmitted sequentially. The method significantly reduces the TCP ACKs, which are transmitted with priority, thereby reducing the round-trip time delay, and improving the data transmission efficiency. An apparatus configured to perform this method is also described.