If you want your one PC to be able to switch between two Fast Ethernet networks, or if you want two PCs to take turns accessing one Fast Ethernet connection, Black Box 100-Mbps ABC Manual Switch is the solution you need!This Fast Ethernet switch is a cost-effective solution when you want a single workstation to access either a secure or nonsecure network connection. Plus it will save you money and desktop space.This 100-Mbps ABC Manual Switch also enables mixed Ethernet connections. Instead of connecting your one PC to two Fast Ethernet networks, you can connect it to one 100-Mbps Fast Ethernet network and one 10-Mbps Ethernet network, provided your PC has that ability.