Chapter 6 - Wireless Network Fundamentals questions and answers

MULTIPLE CHOICE 1. Which of the following is defined as the maximum departure of a wave from the undisturbed state? a. amplitude c. frequency b. spectrum d. wavelength ANS: A PTS: 1 REF: 194 2. Which of the following is true about RF transmissions? a. EM radiation is measured in volts c. frequency is the distance between waves b. frequency has an inverse relationship with wavelength d. cooler objects produce higher-frequency radiation than hotter objects ANS: B PTS: 1 REF: 194-195 3. Which of the following is true about infrared transmissions? a. directed IR transmission relies on reflected light c. the intensity of the light pulse indicates the on or off status of each bit b. diffused IR transmission requires emitter and detector to be aligned d. IR transmissions have speeds up to 25 Mbps. ANS: C PTS: 1 REF: 195 4. Which of the following pairs represents a medium frequency band and its common use? a. 300 KHz-3MHz, AM radio c. 30-300 KHz, cordless phones b. 144-174 MHz, TV channels d. 3-30 MHz, CB and shortwave radio ANS: A PTS: 1 REF: 196