Since wireless is inherently a broadcast （ ）, 802.11 radios also have to deal with the problem that multiple transmissions that are sent at the same time will （ ）, which may interfere with reception. To handle this problem, 802.11 uses a CSMA (Carrier Sense Multiple Access) scheme that draws on ideas from classic wired Ethernet, which, ironically, drew from an early wireless network developed in Hawaii and called ALOHA. Computers wait for a （ ） random interval before transmitting, and defer their transmissions if they hear that someone else is already transmitting. This scheme makes it less likely that two computers will send at the same time. It does not work as well as in the case of wired networks,though.Suppose that computer A is transmitting to computer B, but the radio range of A’s transmitter is too short to reach computer C. If C wants to transmit to B,it can （ ） before starting, but the fact that it does not hear anything does not mean that its transmission will succeed. The inability of C to hear A before starting causes some collisions to occur. After any collision, the sender then waits another, longer, random delay and （ ） the packet. Despite this and some other issues, the scheme works well enough in practice.