The Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol is necessary in Wi-Fi networks because ___________.
RF transmissions can be captured and decrypted without CSMA/CA.
Wi-Fi clients need a standardized method of conserving battery power.
802.11g and 802.11b transceivers need an interpreter for compatibility.
The wireless transmission medium is half-duplex, thus shared by all users.
Wireless data must be converted to a format that is compatible with Ethernet networks.