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The evolving network needs of both commercial and military aircraft are expanding the requirements from slow speeds (1 Mbps) to over 1 Gbps for many new aircraft designs, driven primarily by advanced video technology. Low-cost Ethernet switch technology is a key enabler for advanced aircraft system interconnection. Our research focuses on the evaluation of several gigabit Ethernet (GE) COTS switches to meet avionic requirements. The results indicate that GE COTS switches are beginning to approach the required performance for future avionic applications.