Correct Answer : Option (D) : upto 600 bps
Explanation : When data rate in bits per second is upto 600, modem is low speed.
Correct Answer : left to right
Correct Answer : Fading
Explanation : Tropospheric scatter propagation is subject to two types of fading called Rayleigh fading (due to multipath propagation) and fading due to variations in atmospheric conditions along the propagation path.
Correct Answer : 13 mm