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And he uses DNS as an example of a centralized system, but based on the image, it's a decentralized system. It's a multi-tier system with many sources of truth,

And he uses DNS as an example of a centralized system, but based on the image, it's a decentralized system. It's a multi-tier system with many sources of truth, and many layers of caching.

gregknicholson 8y ago
> many sources of truth Kinda. Not quite. ICANN decides who controls ".foo". That organisation decides who controls "bar.foo", and so on. You can't just make up a domain name and claim it; someone else has to permit you to have it. So perhaps reading the DNS is decentralised, but writing it is centralised.