This netis ST3108V Fast Ethernet Loopback Detection Switch provides an easy way to expand your wired network with 8 10/100Mbps Auto-Negotiation RJ45 ports. All ports support Auto MDI/MDIX function, eliminating the need for crossover cables or uplink ports. The built-in VLAN function for port 1~7 makes them cannot communicate with each other which improves the network security. Port 8 is the uplink port which can communicate with port 1~7 as works as a window to communicate with the external network. Loopback mornitoring and alarming function make it easy to mornitor the LAN network environment and via the Loop Alarm LED to remind the ender users be to be aware of the LAN network wihch makes it more efficient for troubleshooting. Together with the plug-and-play & Green Power feature, it may ensure you a low-cost, easy-to-use, high-performance, seamless and standard upgrade to improve your old network to an 100Mbps network.