The SSL protocol provides “channel security, ” but lacks what property?

A.
A private channel. Encryption is used for all messages after a simple handshake is used to define a secret key.

B.
An authenticated channel. The server endpoint of the conversation is always authenticated, while the client endpoint is optionally authenticated.

C.
A reliable channel. The message transport includes a message integrity check (using a MAC).

D.
An independent authentication where each transmission requires authentication by the server endpoint.

Explanation:
Topic 4, Volume E