"DNS (Domain Name System) is the system which translates web addresses, such as google.com, into an IP address, such as 74.125.224.72/. A network requires the latter to actually access a website, but if the look-up system gets confused, it can give the wrong IP address - which appears to be what happened in the Iconfactory's case. Except that rather than one DNS server messing up, it was the server for the whole of China."
"A leaked MPAA document discloses the studios' lobbyists' plan to force ISPs to give it control over DNS (one of the key goals in SOPA), by using the arguments raised in the decade-old Brand X case, where the ISPs said that they were more than a "telecommunications service" and were, instead, an "information service" because they provided DNS (among other things)."