Additionally, is websites just another word for servers?
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They are called instances. One instance can have multiple servers as backup.
Example: An instance can have a server in New York State and California, if the New York server caught fire, they can redirect you to the California backup server.
So servers are sort of batteries for instances/websites, right?
Youre right. “Servers” are just computers that do all the work behind a website.
But when it comes to lemmy people sometimes use “server” and “instance” to refer to the same thing: what lemmy.ml, lemmy.world, and others are.
And one server can host multiple instances 👍
Which, let’s be honest, is not the case with most instances… not trolling, just saying 🤷.
If by websites you mean instances, then currently close to 1250. Here is a list of them for you.