Field-Programmable Port Extender is a hardware platform that can stop malicious software, such as viruses and worms before it reaches computers. This hardware platform was developed by John Lockwood, a computer- scientist at Washington University. The FPX can scan each and every byte of data packet transmitted through a network at a rate of 2.4 billion bits per second. It uses the Field Programmable Gate Array Circuits to scan computer viruses and worms quickly. Viruses spread when a computer user downloads unsafe software and exchanges infected computer programmes over a network.