What are the implications of using SNI (Server Name Indication) with Cloudflare and TLS ports?

SNI allows Cloudflare to host multiple SSL certificates on the same IP address. It's essential for modern web hosting and is used on port 443. Without SNI, a server wouldn't know which certificate to present for a given hostname. Cloudflare automatically handles SNI, so you generally don't need to configure it manually, but it's a fundamental part of how secure connections are established.