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+ | # Server Name Indication | ||
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+ | Server Name Indication - SNI - is an extension of the [TLS](/glossary/t/tls) TLS protocol. It allows clients to state which hostname they are trying to connect to. | ||
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+ | The server can then serve multiple server certificates on the same IP address and TCP port. | ||
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+ | This lets multiple TLS services to be served off the same IP address without requiring all those sites to use the same certificate. | ||
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+ | The conceptual HTTP equivalent is name-based virtual hosting. | ||
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