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One possible issue is if servers depend on checking in with other servers to start up correctly. There's going to be some interesting circular dependencies that no one's thought about or hopes will never happen.
Plus if you kept the whole internet off for a year, every server would have expired SSL certificates and might not be able to download new ones without manual intervention.
(there's an analogous problem with the power grid called a black start )
grams
nejib
If a) every server in world was connected to a single power source; b) there were no back ups or off grid servers (or any other loop holes); and c) I turned the power off and on again, could I theoretically erase all the information on the internet?
As I suspect the answer is no, if I left it powered off for a year then turned it back on, would there be any issues (purely related to the information stored on the internet, not societal collapse)?