IOGEAR 4-Port Dual-Link DVI Secure KVM Switch, GCS1214TAA 4-port USB DVI secure KVM switch one USB console controls 4 secure computers Port selection via pushbutton only to enhance security (OSD, hotkey methods are not allowed) NIAP-Certified Validated to EAL2+ security requirements,. TAA Compliant Isolated channel per port Makes it impossible for data to be transferred between computers Tamper-evident tape Provides a visual indication of any attempt to gain access to the switch's internal components Chassis intrusion detection If the cover is removed from the switch, the unit becomes inoperable and the LEDs flash Tamper-proof hardware All integrated circuits are soldered directly to the circuit board to prevent tampering with the components Non-reprogrammable ROM Prevents tampering and attempts to reprogram the switch's firmware