Five years ago, Internet traffic was, for the most part, managed by tier 1 providers like AT&T, Verizon, Level 3 Communications, and Global Crossing, all of which connected to thousands of tier 2 networks and regional providers. Today, that has changed. Now, instead of traffic being distributed among tens of thousands of networks, only 150 networks control some 50 percent of all online traffic. Among these new Internet superpowers, it's no surprise to find Google listed. In fact, the search giant accounts for the largest source (6 percent) of all Internet traffic worldwide. This data comes from a new report put out by Arbor Networks, who has just completed a two-year study of 256 exabytes of Internet traffic data, the largest study of global traffic since the start of the commercial Internet in the mid-1990's. The biggest trend to come out of Arbor Networks' report is clearly that of the Internet's consolidation. Today's Internet is "flatter" and "more densely connected" than ever before, reveals Arbor Networks' Chief Research Officer Danny McPherson. Not only is Google the largest traffic source, there are only 30 large companies in addition to Google and including sites like Facebook, Microsoft and YouTube which now account for a disproportionate 30 percent of all Internet traffic.