http://serverfault.com – Why do we make DNS requests separately when an ISP could also be handling the DNS request along with HTTP data simultaneously. So rather than: Ask opendns what yahoos address is. Opendns returns: 66.55.44.11 Hey, Verizon. Send/Request data from 66.55.44.11. Why wouldn't the protocol just request data from "yahoo.com" and verizon interprets the yahoo.com as a split DNS request. (HowTos)