TLS-SNI (Server Name Indication) is an extension of the TLS protocol that allows clients to indicate the server hostname they are attempting to connect to during the TLS handshake. This extension TLS-SNI is crucial for servers hosting multiple SSL/TLS-enabled websites web services on the same IP address.
To determine if your IoT device supports TLS-SNI, you can mock a TLS server locally and analyze the TLS handshake between the server and the client.
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