Please also explain answer was chosen

QUESTION : Determine the decibel value of SNR given a signal power, S=-100dBm, and noise power, N=-128dBm. a. SNR = -228 dB b. SNR = 28 dB c. SNR = -28 dB d. SNR = 228 dB

QUESTION :What is true about delay skew?

a. delay skew is only a problem with coaxial cables

b. delay skew exists in UTP cables (e.g., Cat 5E) where each wire pair is twisted at different twist ratios

c. delay skew only exists in unguided systems where path reflection causes signal copies to reach the receiver at different times

d. delay skew is another term for signal propagation

QUESTION : Determine the maximum theoretical data rate possible given a frequency bandwidth of 36 MHz and SNR=100.

a. 36 Mbps

b. 100 Mbps

c. 72E6 bps

d. 240 Mbps

QUESTION Select the correct statement(s) regarding antenna and RF wave polarization. a. a vertically polarized RF wave cannot be collected by a horizontally polarized antenna

b. right-hand circular polarization is said to be orthogonal to left-hand circular polarization

c. signals of the same frequency can be transmitted together in an non-interfering manner as long as their polarizations are orthogonal to one another

d. all statements are correct

QUESTION :Select the correct statement(s) regarding SMF and MMF fiber optic cables.

a. since MMF cables support multiple modes of light, it has greater capacity and supports greater distances compared to SMF

b. Both MMF and SMF can be designed with step index or graded cores

c. SMF propagates a single mode of light, thus reducing signal distortion

d. all of the statements are correct