why tcp is being displayed if channel is SSL secured?

Question

I searched and found no answer for this so thought it is worth asking here. I have made my client-server(SQL Server) connection secured.It is working fine but whenever i am checking the data packets by using netmon tool i am seeing TCP protocols also along with TLS. If the channel is secure then i should not expect TCP.It shhoud only show TLS.

Please have a look on screenshot below :

Any comment would be appreciated. Thanks

Answer 1

I couldn't find a resource better explaining it but these ones:

• https://msdn.microsoft.com/en-us/library/bb879935(v=sql.110).aspx
• https://technet.microsoft.com/en-us/library/bb879919(v=sql.110).aspx

implicitly try to say that whether you use only SSL or both SSL and non-SSL, the first connection will be made over the default TCP port. Afterwards, if the client requests an SSL connection, then the SSL connection will get started in addition to the default TCP.

By the way, I don't know if netmon is capable of but you can try using WireShark and looking inside those TCP packets to understand better what's going on maybe.