1. Nearly all signals used for communications are part of the electromagnetic spectrum.

True

False

2. In order to compensate for synchronization problems, another type of encoding method called biphase can be employed; these methods place a clock pulse within the data stream.

True

False

3. If a carrier wave is modulated with 4 amplitudes and 4 phase changes, how many possible signal combinations are there?

16

32

4

8

4. Analog encoding of digital information modulates a wave known as the carrier in terms of its phase, frequency or amplitude.

True

False

5. Standards are important when devices must communicate together; the four characteristics governed by these standards are:

mechanical, electrical, functional, and procedural

electrical, physical, functional, and signaling

fundamental, mechanical, procedural, and protocol

protocol, fundamental, physical, and signaling