____ transmission means that to receive and transmit a signal, each antenna must be in sight of the next antenna.

____ transmission means that to receive and transmit a signal, each antenna must be in sight of the next antenna.

____ transmission means that to receive and transmit a signal, each antenna must be in sight of the next antenna. 




a. Omnidirectional
b. Uplink
c. Downlink
d. Line-of-sight








Answer: D


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