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Computer Networks
Physical Layer
Q
Wireless transmission of signals can be done via ___________
AA. Radio waves
BB. Microwaves
CC. Infrared
DD. All of the mentioned
Correct Answer:
D. D. All of the mentioned
Explanation:
Wireless transmission is carried out by radio waves, microwaves and IR waves. These waves range from 3 Khz to above 300 Ghz and are more suitable for wireless transmission. Radio waves can penetrate through walls and are used in radio communications, microwaves and infrared (IR) waves cannot penetrate through walls and are used for satellite communications and device communications respectively.
