Systems and methods of determining DNS information, such as an IP address, associated with a domain name. The methods using a cache segregated to store various domain name system (DNS) data in different data structures. The data structures are configured for minimization of data retrieval times. In some...http://www.google.co.uk/patents/US20040267907?utm_source=gb-gplus-sharePatent US20040267907 - Systems and methods of providing DNS services using separate answer and referral caches
