More and more embedded systems now support multimedia networking on the Ethernet or using the Wireless LAN (WLAN) technologies. An embedded system, typically designed with a low-performance microprocessor in order to reduce both power usage and cost, often shows poor performance on multimedia networking. This paper describes a case study of improving the TCP/IP networking performance of a real-world embedded uClinux multimedia system, which is configured with both a fast Ethernet and a Wi-Fi connection. This paper analyzes networking overhead of the embedded system, and provides specific methods to improve its networking performance based upon the analysis. Our benchmark results indicate that these methods can improve the multimedia networking throughput on the embedded system by about 15%.