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Assuming you have a Website with some higher load, higher demand for availability, or both of them. You can do the following:
Duplicate your Webserver (and the Content of Course) as much as you need Put a Loadbalancer in Front the Webserver, best in Combination with a Firewall Ruleset Terminate TLS on the Loadbalancer once, or on each Webserver directly. Whatever you prefer. You can also double the Loadbalancer with two Boxes the get redundancy on this level.