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Home / blogsGeographic Implications of DNS Infrastructure Distribution
May 03, 2007 11:34 AM PST
| Comments: 2
The past several years have seen significant efforts to keep local Internet communications local in places far from the well-connected core of the Internet. Although considerable work remains to be done, Internet traffic now stays local in many places where it once would have traveled to other continents, lowering costs while improving performance and reliability. Data sent directly between users in those areas no longer leaves the region. Applications and services have become more localized as well, not only lowering costs but keeping those services available at times when the region’s connectivity to the outside world has been disrupted. I discussed the need for localization in a previous paper [PDF], ”Internet Mini-Cores: Local connectivity in the Internet’s spur regions“. What follows in my paper, “Geographic Implications of DNS Infrastructure Distribution“, is a more specific look at a particular application, the Domain Name System (DNS). Most Internet applications depend on the DNS, which maps human-readable domain names to the Internet Protocol (IP) addresses computers understand. Two Internet hosts may have connectivity to each other but be unable to communicate because no DNS server can be reached. This article examines the placement of DNS servers for root and top-level domains and the implications of that placement on the reliability of the services these servers provide in different parts of the world. It is not a “how-to” guide to the construction of DNS infrastructure and does not contain recommendations on DNS policy; it is rather a look at the placement of DNS infrastructure as currently constructed. - ”Geographic Implications of DNS Infrastructure Distribution” has also been published in the March 2007 edition of IP Journal. - Additional updated data on this paper is available here on Packet Clearing House’s website. Source Credit: This has been a featured post from Steve Gibbard, Network Architect. To learn more, visit this participant's full profile page.
More Under: DNS, Internet Protocol, Top-Level Domains 
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#2
| By Steve Gibbard
| May 04, 07
@03:42 pm PST
Matthew Elvey said:
You’re absolutely right. This was an error in the updated data posted on the PCH website (which is generated by an automated script, the output of which I should have looked at more carefully). It’s been corrected. Thanks for pointing it out. -Steve |
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Great stuff, Steve. Minor nit: .MIL and .US aren’t hosted in their home country? Common sense and Page 18 of your paper seem to contradict that.