The Web has grown beyond anybody’s imagination. While significant research has been devoted to understanding aspects of the Web from the perspective of the documents that comprise it, we have little data on the relationship among servers that comprise the Web. In this paper, we explore the extent to which Web servers are co-located with other Web servers in the Internet. In terms of the location of servers, we find that the Web is surprisingly smaller than it seems. Our work has important implications for the availability of Web servers in case of DoS attacks and blocklisting. Categories and Subject Descriptors C.2.5 [Local and Wide-Area Networks]: Internet General Terms Measurement, Experimentation Keywords World Wide Web, server co-location, block lists, DoS attacks
Craig A. Shue, Andrew J. Kalafut, Minaxi Gupta