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    Also, one site may be split across many servers, as is the case with load balancers, like Heroku and Amazon uses. Commented Jun 21, 2016 at 2:25
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    @phyrfox Yea, I thought about adding that, but it's only tangentially related to the question and I didn't want to make the answer too long. Might still end up adding a section for it later. Commented Jun 21, 2016 at 2:41
  • Legend has it that subdomains point so specific computers inside a network. In theory Commented Jun 21, 2016 at 8:40
  • "Traditionally, this was solved by having a dedicated IP address (or port) for every website requiring HTTPS. Obviously, this becomes problematic as we start running out of IPv4 addresses.", So without that invension, we all would have ipv6 by now. Commented Jun 23, 2016 at 10:18