Re: Tanzanian ISPs move closer to establishing an Internet exchange

[Bill Woodcock <woody at pch.net>]

      On 13 May 2003, Michuki Mwangi wrote:
    > Question: why in the first place do most folks have the websites hosted
    > outside Africa?

Rhetorical question, I know, but for those who didn't get Michuki's
answer...  It comes down to this: without local peering, intra-African
traffic gets backhauled four ways through satellite links, whereas traffic
to and from Europe and the U.S. only goes through satellite links twice:

  African >---query---> London >---query---> African
  Eyeball <--response-<   IX   <--response-< Server


  African >---query---> London
  Eyeball <--response-< Server


...and that's what governs both cost and performance.

                                -Bill



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