this post was submitted on 18 Jun 2023
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Yes and no.
Usenet's communities / groups (alt.whatever) were unified. While communities on Fediverse are not. This means that !technology@beehaw.org is a different set of posts than !technology@lemmy.world.
Like Usenet, the federation model means that individual servers can accept, or reject, other server's traffic. This means that posts aren't guaranteed to be global. (https://Lemmy.world and https://Beehaw.org are having a defederation spat right now, at least while moderation tools are being developed to fix the problems). This should be familiar to any old USENET user, though the younger #RedditBlackout group is extremely confused about federation.
Thanks for the clarification. I have another question I hope you can answer. Is it possible to be in an instance that have a federation with lemmy.world and beehaw.org? Even though they have been defederated with each other? I hope my question makes sense...