Which concept was originally established to identify, prepare to attack, engage, and destroy the target?

Which of these is an authentication protocol that uses a hashed version of a user's password so that the user's credentials are not sent over the wire in clear text?

a. Password Authentication Protocol b. Challenge Handshake Authentication Protocol c. Protected Extensible Authentication Protocol-Transport Layer Security d. None of the above

The two services involved with the distribution of messages within a DS are distribution and _________.

Fill in the blank(s) with the appropriate word(s).