CIS 513 Week 5 Midterm Exam – Strayer NEW

CIS 513 Week 5 Midterm Exam – Strayer NEW

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Chapter 1 Through 4

Chapter 1 - Introduction to Wireless Communications

TRUE/FALSE

1. VoIP phones can carry analog data over the Internet.


2. WirelessHD can transfer video and sound at 7 Gbps and higher.


3. UWB WiGig has a range of up to 100 meters.


4. The ZigBee Alliance protocols enable devices like light switches to communicate with one another.


5. RFID technology is implemented by roadside assistance services to link a vehicle and driver to a central service center.


6. 4G technology uses 100% analog transmission for voice and data.


7. An AP connects wireless devices to the wired LAN.


8. DSL is an Internet access technology that uses cable TV lines to make a network connection.


9. The job market for wireless LAN professionals is saturated and likely to decline in coming years.


10. One advantage of wireless technology is that it is immune to interference sources.


MULTIPLE CHOICE

1. What type of device is built into a tablet computer and can send data over radio waves to another device such as a laser printer?
a. VoIP phone c. access point
b. wireless NIC d. Ethernet NIC



2. How can VoIP over Wi-Fi help save money?
a. by eliminating the need for a phone c. by reducing the cost of a smartphone
b. by saving on cellular phone bills d. by not requiring an access point



3. Where would you most likely find RFID tags around the house?
a. on product packages c. in the plumbing
b. in the walls and ceilings d. on the electrical lines



4. What is the typical range for the use of Bluetooth?
a. meters to kilometers c. inches to feet
b. yards to miles d. millimeters to inches




5. With what technology will you find radio modules and link managers?
a. RFID c. Wi-Fi
b. GPS d. Bluetooth




6. Which technology has a maximum range of about 10 meters, can transmit up to 10 Gbps, and is used to transmit high quality audio and video wirelessly?
a. Wi-Fi c. UWB
b. Bluetooth d. RFID




7. Automatic connections between what type of devices create a piconet?
a. VoIP c. Bluetooth
b. Infrared d. WirelessHD




8. In what type of wireless communication device will you find a repeater?
a. satellite c. antenna
b. NFC d. WNIC




9. What kind of network is built around the concept of low-power transmitters built on towers that can use the same radio frequency channel?
a. Wi-Fi 802.11 networks c. UWB A/V networks
b. cellular telephone networks d. GPS tracking networks




10. What type of cellular network uses 100 percent digital transmission for voice and data and can reach rates up to 150 Mbps?
a. CDMA c. 3G
b. 4G d. GSM



11. What kind of device does a WLAN use to facilitate communication between wireless computers?
a. Ethernet switch c. access point
b. GPS hub d. cell station



12. Which wireless standard provides for data transmission speeds up to 600 Mbps with a range up to 375 feet?
a. 802.11g c. 802.16m
b. WiGig d. 802.11n



13. Which technology uses regular phone lines and transmits at speeds up to 256 Kbps?
a. POTS c. T1
b. ISDN d. cable modem



14. Which communication technology should you use if you need to connect three offices which are all within 3 miles of each other at speeds up to 75 Mbps using antennas?
a. T1 c. WiMax
b. DSL d. ISDN



15. Where are you most likely to find the WAP2 protocol in use?
a. cellular phones c. tablets
b. laptops d. servers



16. What term refers to the combining of voice, video and text-processing and access to multiple network platforms from a single device?
a. access aggregation c. digital convergence
b. digital landscape d. network transparency



COMPLETION

1. Smartphones can use software that allow them to make ______________  phone calls over a wireless LAN instead of the cellular network.


2. Bluetooth communicates using small, low-power ______________ called radio modules.




3. In the future, most barcode functions are likely to be replaced by ___________ tags including for the purpose of inventory management.




4. To protect confidentiality, wireless data can be ______________ between the access point and wireless device, allowing only the recipient to decode the message.



5. The FCC, FDA, and EPA have established ________ exposure safety guidelines to limit the signal absorption rate of wireless device users.


MATCHING


a. 3G f. motes
b. Bluetooth g. T1
c. DSL h. UWB
d. J2ME i. WiGig
e. link manager j. WPAN


1. a wireless standard that enables devices to transmit data at up to 721.2 Kbps
over a typical maximum distance of 33 feet

2. a variation of the Java programming language designed for use in portable devices such as cellular phones

3. a very small network that typically extends to 10 meters or less

4. a technology used to transmit data over special telephone lines at 1.544 Mbps

5. an alliance of companies involved in developing a common wireless specification using the 60 GHz band

6. a technology used to transmit data over a telephone line

7. remote sensors used for collecting data from manufacturing equipment or for
scientific research

8. wireless communications technology that allows devices to transmit data at hundreds of megabits or even gigabits per second at short distances

9. a digital cellular technology that can send data at up to 21 Mbps over the cellular telephone network

10. special software in Bluetooth devices that helps identify other Bluetooth devices



SHORT ANSWER

1. Describe how RFID can enhance a family’s convenience in the kitchen.




2. Describe Bluetooth technology and how it can be used in a computing environment.



3. What is UWB and how might it be used in a home?




4. What is a piconet?




5. What does a repeater do in a satellite communication system?




6. How does a WLAN use an access point?

7. Describe a WMAN and discuss a technology a WMAN might use.


8. What is digital convergence and how might it affect how people use network devices?


9. Discuss the use of wireless technologies in home entertainment.


10. Discuss how radio signal interference can affect wireless devices.



Chapter 2 - Wireless Data Transmission

TRUE/FALSE

1. The ASCII code uses 16 bits to represent 128 different characters.


2. Infrared light interferes with radio signals but is not affected by radio signals.


3. The height of a radio wave is called the amplitude of the wave.


4. Spread-spectrum signals are more susceptible to outside interference than narrow-band transmissions.


5. Hopping codes used in FHSS transmissions are configured on the base station by the network administrator.


MULTIPLE CHOICE

1. Which of the following is true about wireless radio signal transmissions?
a. they travel at the speed of light c. they travel as discrete particles
b. they require an atmosphere to move d. they require visible light



2. Which of the following is NOT true about infrared light?
a. it can be used in directed transmissions c. it is less susceptible to interference from visible light sources
b. it can be used in diffused transmissions d. all infrared signals are invisible



3. Which of the following transmits a signal in an infrared device?
a. diffuser c. detector
b. emitter d. antenna



4. Which of the following is NOT a limitation of using infrared wireless systems?
a. they lack mobility c. someone can eavesdrop from another room
b. they use a line-of-sight principle d. diffused transmissions have a range of 50 feet



5. Which of the following is a good application for an infrared wireless system?
a. stream movies from a server c. whole house wireless network
b. wireless outdoor speakers d. data transfer between laptop and camera



6. Which best describes an analog signal?
a. it starts and stops c. consists of discrete pulses
b. intensity varies and is continuous d. Morse code is an example



7. What process must occur to transmit a digital signal over an analog medium?
a. modulation c. decoding
b. decoupling d. emitting


1

8. The distance between a point in one wave cycle and the same point in the next wave cycle is called which of the following?
a. amplitude c. carrier
b. wavelength d. frequency



9. The frequency of a wave is best defined as which of the following?
a. encoding of bits onto an analog wave c. a carrier wave that has been modulated
b. the voltage difference between the peak and trough of the wave d. the number of times a cycle occurs within one second



10. What is the unit of measurement for radio frequency?
a. volt c. Hz
b. rpm d. amp


3

11. What is the role of an antenna on a wireless device?
a. it receives data c. it serves as a ground signal
b. it demodulates d. it transmits and receives data



12. Which of the following is true about baud rate?
a. only one bit can be transferred per signal unit (baud) c. a baud rate of 2400 always means a bandwidth of 2400 bps
b. multiple bits can be transferred with each signal unit d. multiple signal units are needed to represent each bit



13. Which of the following best describes bandwidth in an analog system?
a. the range of frequencies that can be transmitted by a system c. the number of bytes transmitted per minute
b. the number of bits transmitted per second d. the maximum frequency supported by the medium



14. Which of the following is NOT a type of modulation that can be applied to an analog signal?
a. phase c. frequency
b. carrier d. amplitude



15. Which type of radio signal is most susceptible from interference sources such as lightning?
a. AM c. PM
b. FM d. DM



16. Which of the following is NOT an advantage of digital modulation over analog modulation?
a. better use of bandwidth c. better performance during interference
b. requires less power d. modulation techniques are simpler



17. Which binary signaling technique reduces the voltage