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Re:Why SSL was renamed to TLS in late 90s (2014) by ekr____ on Monday June 16, 2025 @09:56AM (#44289527)
FWIW, these aren't actually in TLS 1.0.

Extensions (including SNI) are in later spec but introduces in RFC 3546 (https://www.rfc-editor.org/rfc/rfc3546). Session tickets are in RFC 4507.

What TLS 1.0 did was to leave the door open for extensions by allowing the ClientHello to be longer than what was specified. See https://www.rfc-editor.org/rfc/rfc2246.html#section-7.4.1.2 (scroll to "Forward Compatibility Note")

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