A multiport network device includes output ports, internal rules checking logic, a port filter, and input ports. The input ports receive data frames and transfer the data frames to the internal rules checking logic and the port filter. The internal rules checking logic determines the appropriate output...http://www.google.es/patents/US6839351?utm_source=gb-gplus-sharePatente US6839351 - Parallel packet lookup in a packet-switched network
Parallel packet lookup in a packet-switched network
