Chapter 9 - Wireless Technologies
TRUE/FALSE
1. Wireless technologies are now more reliable than ever.
ANS: T PTS: 1 REF: 405
2. Network applications use lower frequencies than local radio station broadcasts.
ANS: F PTS: 1 REF: 410
3. A line-of-sight transmission is one in which the signal bounces off the atmosphere to skip across the
country or across continents.
ANS: F PTS: 1 REF: 411
4. Priority-based access is intended for communications that are time-sensitive.
ANS: T PTS: 1 REF: 416
5. The 802.11g standard is an extension of the 802.11a standard and enables data transfer rates up to 54
Mbps in the 2.4 GHz range.
ANS: F PTS: 1 REF: 418
6. It is a commonly accepted practice to combine both an IBSS and an ESS network in the same
proximity.
ANS: F PTS: 1 REF: 421
7. On a wireless network, moving a laptop from cell to cell is an example of roaming.
ANS: T PTS: 1 REF: 422
8. Infrared is susceptible to interference from EMI.
ANS: F PTS: 1 REF: 425
9. Transmission latency of LEO satellites is much lower than for regular satellite transmissions.
ANS: T PTS: 1 REF: 430
MODIFIED TRUE/FALSE
1. Radio waves, infrared, x-rays, and microwaves are all forms of electromagnetic radiation.
_________________________
ANS: T PTS: 1 REF: 407
2. A(n) watt represents a radiated alternating current or emission of one cycle per second.
_________________________
, ANS: F
Hertz
Hz
PTS: 1 REF: 407
3. A broadcast range is also called a(n) band. _________________________
ANS: T PTS: 1 REF: 410
4. A(n) transceiver is a device that sends out and picks up radio waves. _________________________
ANS: F, antenna
PTS: 1 REF: 414
5. All devices that conform to the 802.11b standard must be able to transmit at 6, 12, and 24 Mbps.
_________________________
ANS: F, 802.11a
PTS: 1 REF: 417
6. The current practical maximum distance for 802.11b devices is about 100 feet.
_________________________
ANS: F, 300
PTS: 1 REF: 419
7. The ESS topology does not use access points. _________________________
ANS: F, IBSS
PTS: 1 REF: 420
8. In terrestrial microwave, the signal is transmitted between two directional parabolic antennas.
_________________________
ANS: T PTS: 1 REF: 426
9. Satellite microwave is the most expensive type of microwave networking.
_________________________
ANS: T PTS: 1 REF: 427
MULTIPLE CHOICE
1. ____ technologies are typically used for short distance communications with in an office, a building,
or between buildings.
a. Radio c. Microwave
b. Infrared d. Both A and B.
TRUE/FALSE
1. Wireless technologies are now more reliable than ever.
ANS: T PTS: 1 REF: 405
2. Network applications use lower frequencies than local radio station broadcasts.
ANS: F PTS: 1 REF: 410
3. A line-of-sight transmission is one in which the signal bounces off the atmosphere to skip across the
country or across continents.
ANS: F PTS: 1 REF: 411
4. Priority-based access is intended for communications that are time-sensitive.
ANS: T PTS: 1 REF: 416
5. The 802.11g standard is an extension of the 802.11a standard and enables data transfer rates up to 54
Mbps in the 2.4 GHz range.
ANS: F PTS: 1 REF: 418
6. It is a commonly accepted practice to combine both an IBSS and an ESS network in the same
proximity.
ANS: F PTS: 1 REF: 421
7. On a wireless network, moving a laptop from cell to cell is an example of roaming.
ANS: T PTS: 1 REF: 422
8. Infrared is susceptible to interference from EMI.
ANS: F PTS: 1 REF: 425
9. Transmission latency of LEO satellites is much lower than for regular satellite transmissions.
ANS: T PTS: 1 REF: 430
MODIFIED TRUE/FALSE
1. Radio waves, infrared, x-rays, and microwaves are all forms of electromagnetic radiation.
_________________________
ANS: T PTS: 1 REF: 407
2. A(n) watt represents a radiated alternating current or emission of one cycle per second.
_________________________
, ANS: F
Hertz
Hz
PTS: 1 REF: 407
3. A broadcast range is also called a(n) band. _________________________
ANS: T PTS: 1 REF: 410
4. A(n) transceiver is a device that sends out and picks up radio waves. _________________________
ANS: F, antenna
PTS: 1 REF: 414
5. All devices that conform to the 802.11b standard must be able to transmit at 6, 12, and 24 Mbps.
_________________________
ANS: F, 802.11a
PTS: 1 REF: 417
6. The current practical maximum distance for 802.11b devices is about 100 feet.
_________________________
ANS: F, 300
PTS: 1 REF: 419
7. The ESS topology does not use access points. _________________________
ANS: F, IBSS
PTS: 1 REF: 420
8. In terrestrial microwave, the signal is transmitted between two directional parabolic antennas.
_________________________
ANS: T PTS: 1 REF: 426
9. Satellite microwave is the most expensive type of microwave networking.
_________________________
ANS: T PTS: 1 REF: 427
MULTIPLE CHOICE
1. ____ technologies are typically used for short distance communications with in an office, a building,
or between buildings.
a. Radio c. Microwave
b. Infrared d. Both A and B.
