__________ sends out a message to all other computers indicating it is going to send out data.

A.
CSMA/CD

B.
CSMA/CA

C.
CSMA/HB

D.
PPP

E.
SLIP

Explanation:
CSMA/CA sends out a message to all other computers indicating it is going to send out data.
CSMA/CA or token ring networking uses this approach to reduce the amount of data collisions. Note:
When computers use the carrier sense multiple access with collision detection (CSMA/CD) protocols,
they monitor the transmission activity, or carrier activity, on the wire so that they can determine
when would be the best time to transmit data. Carrier sense multiple access with collision avoidance
(CSMA/CA) is an access method where each computer signals its intent to transmit data before it
actually does so. pg 390-391 Shon Harris All-In-One CISSP Certification