A network device includes at least one first network port, at least one second network port, a MUX unit and a switching unit. The MUX unit is connected to the at least one first network port. The MUX unit includes a trunk circuit and an output. The trunk circuit is configured to aggregate data packets...http://www.google.de/patents/US7660292?utm_source=gb-gplus-sharePatent US7660292 - System and method for isolating network clients
