Net infrastructure depends on centralised indexes—Domain Name Servers
"However decentralized the net might feel when we are posting to our blogs, it was actually designed around highly centralized indexes called domain name servers." [Douglas Rushkof]
"Every time we instruct our browsers to find a web page, they ping one of these authorized master lists in order to know where to go. Removing WikiLeaks or any other site, group, top-level domain or entire nation is as easy as deleting it from that list."
Douglas Rushkof on CNN.