The Cisco PIX 525 Security Appliance delivers a wealth of advanced security and networking services for medium-to-large enterprise networks, in a reliable, purpose-built appliance. Its modular two-rack unit (2RU) design incorporates two 10/100 Fast Ethernet interfaces and supports a combination of up to eight additional 10/100 Fast Ethernet interfaces or three additional Gigabit Ethernet interfaces, making it an ideal choice for businesses requiring a high performance, Gigabit Ethernet-ready solution that provides solid investment protection.