Our new, refurbished and used Cisco PIX 535 modular three-rack-unit design supports up to ten 10/100 Fast Ethernet interface or nine Gigabit Ethernet interface and redundant power supplies , making it an ideal appliance for officees that need the highest levels of performance , port density , reliability , and investment protection. It also delivers up to 1.7 Gbps of firewall throughput with the capability to handle more than 500 , 000 simultaneous sessions.