+ 0 Votes What are you trying to achieve TobiF 2 years ago If you're working in a highly secure environment, then you may not want any computer to be concurrently attached to both the secure network and the public access network, since the computer then might become a bridge/router between the two networks. In this kind of situations, many organizations resort to giving each employee two computers, to minimize the risk of computer malware / viruses reaching the secure network. If your network is not secured to this level, then some of the previous answers may apply. (firewalls, routers etc.) You might also look at VLAN, where the computer may use one physical connection, but where virtually all traffic is separated into different logical networks.