QUESTION 2 Select the correct statement(s) regarding the signal-to-noise ratio (SNR).

		a. SNR represents the ratio of transmit signal power over the noise power of all sources including thermal, impulse, IM, CCI, and crosstalk noise
		b. the noise (i.e., noise floor) in the signal-to-noise ratio, represents thermal noise
		c. the noise power, in the signal-to-noise ratio, occupies a narrow band in the frequency domain
		d. all of the above are correct statements

QUESTION 4: Crosstalk noise can occur in either guided or unguided communication channels. True / False.