See Mapping and Visualizing the Internet. Bill Cheswick, Hal Burch, and Steve Branigan, Usenix 2000 general conference (San Diego), http://www.cheswick.com/ches/papers/mapping.ps.gz which includes some measurements of Yugoslavia's Internet sites.
--Steve Bellovin, http://www.research.att.com/~smb (me)
http://www.wilyhacker.com (2nd edition of "Firewalls" book)
