MSIT 611 Computer Science Wireless & Mobile Systemsexam Practice

this is the text book Olenewa, J. (2017). Guide to wireless communications (4th ed.). Cengage Learning Print ISBN: 978-1305958531 eText ISBN: 978-035739640

Chapter 1
Review Questions
1. Ultra Wide Band transmission technology is used primarily for __________.
a. displaying webpages on a cellular phone
b. connecting devices installed close together at very high speeds
c. finding the location of a car within a city
d. transmitting data at distances of up to 35 miles
2. Bluetooth devices communicate using small radio transceivers called __________ that are
built onto microprocessor chips.
a. receivers
b. transponders
c. radio modules
d. link managers
3. ZigBee devices transmit data at rates of up to _________.
a. 250 kbps
b. 1 Mbps
c. 721.3 kbps
d. 3 Mbps
4. IEEE 802.11n equipped devices can be as far as 375 feet (114 meters) apart and can send and
receive data at rates over __________ Mbps, accordng to the IEEE standard.
a. 75
b. 600
c. 100
d. 54
5. Each Bluetooth device uses a __________, which is a special software that helps identify
other Bluetooth devices.
a. frame
b. link manager
c. repeater
d. bridge
6. Bluetooth can send data through physical barriers, like walls. True or False?
7. Bluetooth devices can transmit at maximum data at rates 75 Mbps. True or False?
8. A wireless network interface card performs basically the same functions and looks similar to
a traditional network interface (NIC) card. True or False?
9. An Earth station transmits to a satellite at one frequency, and the satellite regenerates and
transmits the signal back to Earth on the same frequency. True or False?
10. Eliminating cable installation costs is a advantage of a wireless technogies. True or False?
11. The automatic connection between various Bluetooth devices creates a network called a(n)
__________.
a. micronet
b. small net
c. piconet
d. Intranet
12. 4G (fourth generation) cellular technology allows data connections at a maximum rate of
over __________ in fast-moving vehicles.
a. 2 Mbps
b. 1 Gbps
c. 20 Mbps
d. 100 Mbps
13. An 802.11 wireless NIC, when configured to communicate with a wired network, sends its
signals through invisible radio waves to __________.
a. another computer directly
b. an access point
c. a wireless server
d. the Internet
14. __________ is a wireless technology that can be used for data communications and transmit
as far as 35 miles.
a. Wi-Fi
b. Microwave
c. WiGig
d. WWAN
15. How can a ZigBee network be extended beyond its maximum range?
a. By using network cables
b. It can’t, you would have to use Wi-Fi or another kind of wireless network.
c. ZigBee devices can pass information through to other devices.
d. By installing a ZigBee AP
16. Explain the role of an access point (AP) in a WLAN.
17. Describe the difference between WPANs, WLANs, WMANs, and WWANs with a single
word.
18. What could you use a WLAN for, in a classroom setting?
19. Pick one of the types of wireless networks described in this chapter, and describe how it can
reduce installation time.
20. Write a paragraph about how implementing a wireless network can be helpful in case of
disaster recovery. .
Chapter 2
Exercise
Print your full name in Binary.
Review Questions
1. Which range of the electromagnetic spectrum is less susceptible to interference from sources
of visible light?
a. ultraviolet
b. gamma light
c. infrared
d. yellow light
2. The distance between one positive peak and the next positive peak of a wave is called
_________.
a. frequency
b. wavelength
c. elasticity
d. intensity
3. Which type of transmission is used when human voice is modulated directly onto a carrier
wave?
a. analog
b. digital
c. diffused
d. directed
4. Why do computers and data transmission equipment use binary?
a. They are electrical devices, and electricity has only two states.
b. Base 2 is too difficult to use.
c. Base 10 was developed before binary.
d. Binary is the next step beyond quadecimal.
5. Eight binary digits grouped together form which of the following?
a. byte
b. bit
c. binary
d. 2x quad
6. The American Standard Code for Information Interchange (ASCII) can represent up to 1024
characters. True or False?
7. Letters of the alphabet and symbols are stored using the ASCII code, but not numbers used in
calculations. True or False?
8. Infrared light, though it may be invisible, has many of the same characteristics of visible
light. True or False?
9. Infrared wireless systems require that each device needs to have only one component: either
an emitter that transmits a signal or a detector that receives the signal. True or False?
10. Infrared wireless systems send data by the intensity of the light wave instead of whether the
light signal is on or off. True or False?
11. Infrared wireless transmission can be either directed or _________.
a. analog
b. digital
c. diffused
d. detected
12. Radiotelephony or radio travels in waves known as _________ waves.
a. electromagnetic
b. analog
c. magnetic
d. electrical
13. Unlike a digital signal, a(n) _________ signal is a continuous signal with no “breaks” in it.
a. magnetic
b. visible
c. light
d. analog
14. Changing a signal to encode data onto it is known as _________.
a. baud
b. demodulation
c. modulation
d. continuity
15. PSK is an example of _________.
a. ASCII encoding
b. unicoding
c. phase modulation
d. digital modulation
16. Explain how a radio antenna works when transmitting a signal.
17. Explain the difference between bps and baud rate.
18. Explain the difference between amplitude modulation, frequency modulation, and phase
modulation.
19. What is quadrature amplitude modulation (QAM) and how does it work?
20. List and describe the three different types of binary signaling techniques.