Question: The term refers to changes made in a carrier according to the information being transmitted. modulation multiplexing modem modification Question 2 10 pts Suppose a

The term refers to changes made in a carrier according to

The term refers to changes made in a carrier according to the information being transmitted. modulation multiplexing modem modification Question 2 10 pts Suppose a data transmission system uses +5 Voltage signal to represent binary 1 and +2 Voltage signal to represent binary 0 , which type of modulation technology is this system using? Amplitude Modulation (AM) Frequency Modulation (FM) Phase Modulation (PM) none of the above Question 3 10pts Suppose a data transmission system uses 10KHz signal to represent binary 1 and 20KHz signal to represent binary 0 , which type of modulation technology is this system using? Amplitude Modulation (PM) Frequency Modulation (FM) Phase Modulation (PM) none of the above Question 4 10 pts Data communications typically use high frequency carrier signals for modulation in order to select a frequency that will propagate well over long distance represent more information with the same number of signals enhance data communications security allow multiple users to share the same transmission medium

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