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by sriku
2999 days ago
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That's the right word. (General note) Federated is a bit different from decentralised. For example, email is federated, but not decentralised. In a federated network, if "your service providing server" is down (like gmail.com), then you don't have service, though others on other parts of the network would continue to have service. With a decent sized network, there is no "your service providing server" and other machines can take over when one fails. Decentralisation always goes along with redundancy whereas federation doesn't require redundancy. |
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Obviously a lot of this is very squishy and overlaps a lot even within the same system.
Look at DNS. It's nominally a centrally-rooted hierarchy, but the root is operated by consensus rather than monarchy, so how do you classify that? Then each domain can be operated by a separate organization, so essentially federated but not exactly because it's still a hierarchy. Meanwhile the recursive resolvers and caches are fully distributed -- use any of them and the results are (supposed to be) the same.