What is TLS and how does a TLS handshake establish a secure connection?

• A. TLS provides encryption and authentication for sessions; handshake includes clientHello, serverHello, certificate exchange, key exchange, and finished messages, after which symmetric keys are used.
• B. TLS is a transport-layer mechanism that encrypts data after it is transmitted.
• C. TLS handshake uses only one message and no certificates.
• D. TLS does not use symmetric keys.

Answer: (A)