Chapter 3

1. Serial communication is the process of transmitting and processing data one bit at a time.
2. In serial communication, data is transmitted and processed one bit at a time, whereas in parallel communication, data is transmitted and processed one byte at a time (or 8 bits).
3. False. The refresh rate signifies the number of times the beam of electrons shot from the electron gun redraws the screen in one second.
4. WUXGA, 1920 × 1200
5. DB-9 (oldest and rarely found any more), DIN-type, PS-2, USB (still most popular), and wireless (gaining popularity very quickly)
6. False
7. Modems convert digital signals from a computer into analog signals that can be transmitted over phone lines and convert incoming analog into digital signals. Cable modems allow high-speed access to the Internet over cable TV (CATV) lines.