A computer implemented method in which Internet Protocol (IP) packets are routed within a first Internet Service Provider's (ISP's) domain from a single network device with a first database. The first database includes addresses of the first ISP. IP packets are also routed within a second ISP's domain...http://www.google.com.tw/patents/US7281039?utm_source=gb-gplus-share專利 US7281039 - Domain isolation through virtual network machines
