Handshake protocol is the most complex part of SSL. Which two of these statements are true of SSL handshake protocol? (Choose two)

A.
This protocol allows the server and client t o authenticate each other.

B.
This protocol is used after any application data is transmitted.

C.
This is not a single protocol but rather two layers of protocol

D.
This protocol is used to exchange cryptographic keys using DH

E.
This protocol consists of a series of message exchanged by t he client and server.