RCDD Chapter 17

1. Geography and atmosphere can affect wireless communications and you should consider these when designing a wireless system.

True

False

2. Radio frequency identification (RFID) denotes technologies that use radio waves for automatic identifcation and data collection?

True

False

3. The chip and the antenna together are called an RFID tansponder or an RFID tag.

True

False

4. Distributed Antenna system (DAS) typically consists of active components that transmit and receive signals from the headend equipment or other backend elements and radiated RF signals into antennas.

True

False

5. Propagaion is the motion of waves through or along a medium.

True

False

6. Electromagnetic radiation (EMR) is radiation composed of oscillation electric and magnetic fields and propagated through a medium.

True

False

7. Modulation is the process of altering the amplitude, frequency, or phase of a carrier signal in a measured way, which allows for data to be added to it.

True

False

8. The choice of cabling for the design is based on what?

Frequency

Radio equipment

Antenna

Length of cable

All the above

9. Is this right Em = 0 to infinity

Yes

No

10. Use jumpers to connect the feed line to the antenna and the equipment. This allows the system to be serviced without damaging any part of the system.

True

False

11. When choosing the antenna support structure for installation you must consider the following?

Wind zone and wind loading

Ice loading

If in the 8 km (5mi) approach area near and airport

If the antenna supporting structrue is more than 61 m (200 ft)

All the above

12. A distributed antenna system (DAS) transmits or relays what?

IF signals

IR signals

RF signals

IVR signals

13. Define Absorption?

Adrupt change in direction of a wave

Abrupt change in direction of a wave

Change in the level, direction, frequency, or polarization

Bending of sound, radio, or light waves around an object

Loss of energy in an EM signal as it passes through a medim

14. An AP can be supplied with electrical power and connected to a cabled network using a single Ethernet cable.

True

False

15. Technological condiderations in the design of a wireless network include :

Scalability of the network, which should always be considered in the initial design.

Compatibility of the overall network, which ensures that the proposed system integrates with the current network

A and C

A, B and C

16. Define the following statement: Cannot transmit and receive at the same time. common in portable two-way radios, WLANS. , and radio telemetry units.

Half-duplex

Frequency division duplex

Time division duplex

17. Passive distribution equipment in a DAS is defined as wquipment that does not require external power inputs.

True

False

18. What is the band for Ultrahigh frequency (UHF)

30Hz to 300Hz

300 MHz to 3000 MHz

300 Hz to 3000 Hz

3 GHz to 30 GHz

19. Typical barriers and obstruction to EM waves include buildings and other man-made objects. What are Natural obstructions?

Trees

Hills,

Bodies of water

Mountains

All the above.

20. Radiation cable technology allows a single length (run) ________ cable to be the radiation (Transmit) and receive antenna.

Singlemode

Balanced Twist pair

Coaxial

Multimode

21. What is a MAN is defined to be within what?

80km (60 MI)

80km (50 mi)

70km (60 mi)

22. What are two common cabling topologies that serve a DAS within a building structure?

Physical Star

Star topology

Tapped-trunk topology

Bus and Ring

Submit

23. A PAN is a network in which all interconnected computers are distributed locally, typically within a radius of ________?

15 m (50 ft)

10 m (30 ft)

5 m (16 ft)

20 m (65 ft)

24. Some commonly retransmitted services of a DAS includes:

Emergency medical service (EMS) radio

Industrial, scientific, and medical (ISM)

Broadband radio service (BRS)

Wireless local loop

Local unlicensed walkie-talkies

Submit

25. The selection of the proper antenna for the application is based on many factors:

Required gain

Allowable wind load

Frequency

Aesthetics

Zoning

Submit

26. The frequency or EM spectrum is the range of frequencies of EMR from______ to infinity?

One

Zero

Two

Twenty

Three

27. A MAN is a high-speed data intra-city network, which links multiple location. It is a network of limited geographic scope, generally defined to be within an _______ radius?

80 km (50 mi)

70 km (40 mi)

60 km (30 mi)

100 km ( 70 mi

28. An RFID system comprises a reader (or interrogator) of what two things?

Associated antenna

Transponder

Toolbooths

Security and access control.

Submit

29. _______ is the signal attenuation that would result if all absorbing, diffracting, obstructing, refracting, scattering, and reflecting influences were removed.

Line of sight

Free space loss

Spectrum groups

Absorption

30. Define Absorption

Bending of sound, radio, or light waves around an object, barrier, or aperture edge.

Is the loss of energy in an EM signal as it passes through a medium.

31. Line of sight (LoS equipment requires an unobstructed path between _ or more points. The unobstructed path must include enough clearance for the ___ zone determined by the frequency of the radio?

One, light

Two, output

Two, fresnel

One, frequency

Two, frequency

32. At the top of the tower, the antenna requires what type of connector.

7/16 n connector

7/8 n connector

3/8 n connector

1/4 n connector

33. For most application, Straight tip (ST) type (optical fiber), Subscriber connector (SC) type (optical fiber) are just a few connector types that are most commonly associated with DAS. What are several more?

N type (coaxial)

F type (coaxial)

Bayonet Neil-Concelman (BNC) type (coaxial)

RJ45 (unshielded or shielded twisted-pair

LC type (optical fiber)

Submit

34. UWB, Ultra Wideband is a wireless technology designed for short-range PAN and is based on what?

IEEE 802.15.3A

IEEE 802.14.3A

IEEE 802.13.3A

IEEE 802.12.3A

35. At very high frequencies _______ cables tend to have very high losses?

Fiber

Coaxial

Balanced twisted pair

36. The role of an AP is to serve as a cental point for communications and management on a ______?

VLAN

PAN

WLAN

LAN

37. What does 802.15.4 stand for?

WAN

MAN

Token Ring

ZigBee

38. When installing a feed lineor waveguide across a room, you should support the feed line or waveguide at least _____ above the roof?

1-1/2

2-1/2

4 in

36 in

39. Antennas used in WLAN environments can be classified into three categories:

Unidirectional

Directional

Bidirectional

Omnidirectional

Submit

40. Radio systems are comprised of the following: lightning protection systems, Supporting structure for antenna, structure in which to place the radio equipment, Feed line to connect the signal into the air and retrieve it from the air, battery or power source. What are several others?

Transmitter with a modulator to place information into the signal

Amplifier to increase the signal level

Receiver to hear the signal

Antenna to place the signal into the air and retrieve it from the air

Submit

41. Both PICCs and VICCS cards use _______ MHz air interface.

15.56 mhz

13.56 mhz

14.56 mhz

50 mhz

42. What are some applications for RFID?

Security and access control

Asset management and Animal tracking and lovestock management

Airline baggage tracking, and Wristbands (e.g., in hospitals, amusement parks)

Antitheft systems for automobles, and key cards and smart cards

Toolbooths

Submit

43. Some commonly retransmitted services of a DAS include:

Cellular services

Personal communications sevices (PCS)

National Public Safety Planning Advisory Committe (NSPCA)

Enhanced specialized mobile radio (ESMR)

Pocket pagers

Submit

44. What is the weakest part of the antenna system?

Jumpers

Connectors

Feed cable

45. What is the IEEE standard for Working group WLAN

802.15

802.11

802.7

802.6

46. Ultrahigh frequency (UHF)- cellular and trunk radio = _ to __?

300 MHz to 3000 MHz

3 GHz to 30 GHz

300 Hz to 3000 Hz

30 MHz to 300 MHz

47. Transmits and receives at RF alternately in sequential time slots on a single frequency is what type of wireless transmission?

Half-duplex

Frequency division duplex

Time division duplex

48. The feed line can be connected directly to the antenna.

False

True

49. List the following cables commonly recongnized for DAS cable are?

Singlemode optical fiber cable

Multimode optical fiber cable

Unshielded twisted-pair cable

Shielded twisted-pair (STP) cable

Coaxial cable

Submit

50. What are two common cabling topologies that serve a distributed antenna systems?

Star topology

Ring topology

Tapped-topology

Submit

51. Both VICCs and PICCs card standards use a ______ megahertz (MHz) air interface?

13.62

13.56

13.82

13.55

13.22

52. What frequencies are primarily used for public safety applications?

2GHz to 11GHz

6GHz to 11GHz

4GHz to 11GHz

53. How many voltage injectors are currently in use?

One

Two

Three

Four

54. The reliability of a wireless network is defined by a systems what three things?

Accessibility

Continuity

Consistency

Cost

Ease of implementation

Submit

55. An AP should not be installed as a stand-alone unit.

True

False

56. An AP cna be supplied with electrical power and connected to a cable netwok using a single _________ cable? This feature is commonly referred to as PoE.

Multimode

Singlemode

Ethernet

Balanced twisted pair

57. The International Telecommunication Union (ITU) recognizes how many bands from 30 hertz (Hz) to 30000 Ghz?

24

26

12

14

27

58. What system provides a high-speed data transmissions of 144 kb/s and higher?

1G

2G

3G

4G

59. If you are installing a feed line or waveguide across a roof, it must be supported by at least ______ above the roof?

38 mm (1-1/2 in)

40 mm (2 in )

48 mm (2-1/2 in

25 mm (1 in)

60. Radiation cable is useful in combined systems because of its wide bandwith, allowing operation from ____ MHz to more than _ GHz (with some limitaions)

60 MHz, 3 GHz

70 MHz , 2 GHz

100 MHz, 10 GHz

61. What are characteristics of Vicinity-integrated circuits cards (VICCs)

Designed for electronic wallets and smart cards

Fewer security features

Distance up to 750 mm (29.53 in )

Distance up to 101 mm (4 in)

Designed for smart lables and access control

Submit

62. ______ GHz and above frequencies are used primarily in the private sector for PTP applications.

17 GHz

18 GHz

16 GHz

15 GHz

63. Encoders are not part of the Radio systems.

True

False

64. Coaxial cable has closely spaced slots in the inner conductor.

True

False

65. Antennas used in WLAN environments can be classified into what three categories?

Unidirectional

Bi-directional

Directional

Omnidirectional

Submit

66. ________ are used in both cabled and wireless network environments to link network access devices and extend the physical span or coverage zone of a network.

Switches

Hubs

Bridges

Routers

67. Ulta Wideband (UWB) is a wireless technologh designed for what and is based on what?

WAN 802.11

PAN 802.15

Token Ring 802.5

Short range pans 802.15.3a

68. In Short Message Services a message must be no longer than _______ alphanumeric characters and contain no images or or graphics?

140

150

220

225

160

69. Some commonly retransmitted services of a DAS include everything but what?

Cellular sevice

Personal communications service

National public safety planning advisory committe

Pocket pagers

FRS

70. Passive distrubution equipment in a DAS is defined as equipment that does require external power input.

True

False

Does not require external power input.

Explanation

Does not require external power input.

71. When using radomes a path loss of ____ is common?

.1 dBi

.2 dBi

.3 dBi

.4 dBi

.5 dBi

72. What are the three mor common forms of multiplexing?

FDMA

TDMA

PCM

CDMA

TDM

Submit

73. ESMR is a propietary cellular network using frequencies within ______ MHz bands that had previously been used for fleet dispathch?

500 MHz

600 MHz

700 MHz

800 MHz

74. The role of an AP is to serve as a central point for communications and management on a WPAN.

True

False

WLAN

Explanation

WLAN

75. What are the characteristics of Proximity integrated circuit cards (PICCs)?

Distance up to 101 mm (4 in)

Designed for electronic wallets and smart cards

More encryption and security features

Designed for smart lables and access control

Fewer security features

Submit

76. In Metropolitan Environments some examples of wireless technologies are 900 MHz and orthogonal frequency division multiplexing (OFDM) technologies for indoor multipoint.

True

False

Outdoor multipoing

Explanation

Outdoor multipoing

77. Typicall backend equipment consists of the following components: Signal converters and combiners, amplifiers and transeivers, antenna ports, antennas what are the other components?

Slave processors

Power supplies

Host ports

Backend eqipment ports

Power Ports

Submit

78. Antenna types are classified into several types, Patch or microstrip, reflector, wire, lens, what are several other types?

Array

Aperture

Differential

Open wire

Submit

79. Code Division multiple access (CDMA) is a coding scheme used as a modulation/demodulation technique in which single channels are independently coded for transmission/reception over a single wideband channel.

True

False

Mutiple channels are independenlty coded

Explanation

Mutiple channels are independenlty coded

80. Backend equipment can include signal what?

Expansion modules

Power supplies

Host ports

Signal repeaters

Remote units

Submit

81. What are the four modulation techniques used within wireless 802.11

BPSK

CPSK

QPSK

CCK

QAM

Submit

RCDD Chapter 17

1. Geography and atmosphere can affect wireless communications and you should consider these when designing a wireless system.

2.

What first name or nickname would you like us to use?

2. Radio frequency identification (RFID) denotes technologies that use radio waves for automatic identifcation and data collection?

3. The chip and the antenna together are called an RFID tansponder or an RFID tag.

4. Distributed Antenna system (DAS) typically consists of active components that transmit and receive signals from the headend equipment or other backend elements and radiated RF signals into antennas.

5. Propagaion is the motion of waves through or along a medium.

6. Electromagnetic radiation (EMR) is radiation composed of oscillation electric and magnetic fields and propagated through a medium.

7. Modulation is the process of altering the amplitude, frequency, or phase of a carrier signal in a measured way, which allows for data to be added to it.

8. The choice of cabling for the design is based on what?

9. Is this right Em = 0 to infinity

10. Use jumpers to connect the feed line to the antenna and the equipment. This allows the system to be serviced without damaging any part of the system.

11. When choosing the antenna support structure for installation you must consider the following?

12. A distributed antenna system (DAS) transmits or relays what?

13. Define Absorption?

14. An AP can be supplied with electrical power and connected to a cabled network using a single Ethernet cable.

15. Technological condiderations in the design of a wireless network include :

16. Define the following statement: Cannot transmit and receive at the same time. common in portable two-way radios, WLANS. , and radio telemetry units.

17. Passive distribution equipment in a DAS is defined as wquipment that does not require external power inputs.

18. What is the band for Ultrahigh frequency (UHF)

19. Typical barriers and obstruction to EM waves include buildings and other man-made objects. What are Natural obstructions?

20. Radiation cable technology allows a single length (run) ________ cable to be the radiation (Transmit) and receive antenna.

21. What is a MAN is defined to be within what?

22. What are two common cabling topologies that serve a DAS within a building structure?

23. A PAN is a network in which all interconnected computers are distributed locally, typically within a radius of ________?

24. Some commonly retransmitted services of a DAS includes:

25. The selection of the proper antenna for the application is based on many factors:

26. The frequency or EM spectrum is the range of frequencies of EMR from______ to infinity?

27. A MAN is a high-speed data intra-city network, which links multiple location. It is a network of limited geographic scope, generally defined to be within an _______ radius?

28. An RFID system comprises a reader (or interrogator) of what two things?

29. _______ is the signal attenuation that would result if all absorbing, diffracting, obstructing, refracting, scattering, and reflecting influences were removed.

30. Define Absorption

31. Line of sight (LoS equipment requires an unobstructed path between ___ or more points. The unobstructed path must include enough clearance for the _____ zone determined by the frequency of the radio?

32. At the top of the tower, the antenna requires what type of connector.

33. For most application, Straight tip (ST) type (optical fiber), Subscriber connector (SC) type (optical fiber) are just a few connector types that are most commonly associated with DAS. What are several more?

34. UWB, Ultra Wideband is a wireless technology designed for short-range PAN and is based on what?

35. At very high frequencies _______ cables tend to have very high losses?

36. The role of an AP is to serve as a cental point for communications and management on a ______?

37. What does 802.15.4 stand for?

38. When installing a feed lineor waveguide across a room, you should support the feed line or waveguide at least _____ above the roof?

39. Antennas used in WLAN environments can be classified into three categories:

40. Radio systems are comprised of the following: lightning protection systems, Supporting structure for antenna, structure in which to place the radio equipment, Feed line to connect the signal into the air and retrieve it from the air, battery or power source. What are several others?

41. Both PICCs and VICCS cards use _______ MHz air interface.

42. What are some applications for RFID?

43. Some commonly retransmitted services of a DAS include:

44. What is the weakest part of the antenna system?

45. What is the IEEE standard for Working group WLAN

46. Ultrahigh frequency (UHF)- cellular and trunk radio = _____ to ______?

47. Transmits and receives at RF alternately in sequential time slots on a single frequency is what type of wireless transmission?

48. The feed line can be connected directly to the antenna.

49. List the following cables commonly recongnized for DAS cable are?

50. What are two common cabling topologies that serve a distributed antenna systems?

51. Both VICCs and PICCs card standards use a ______ megahertz (MHz) air interface?

52. What frequencies are primarily used for public safety applications?

53. How many voltage injectors are currently in use?

54. The reliability of a wireless network is defined by a systems what three things?

55. An AP should not be installed as a stand-alone unit.

56. An AP cna be supplied with electrical power and connected to a cable netwok using a single _________ cable? This feature is commonly referred to as PoE.

57. The International Telecommunication Union (ITU) recognizes how many bands from 30 hertz (Hz) to 30000 Ghz?

58. What system provides a high-speed data transmissions of 144 kb/s and higher?

59. If you are installing a feed line or waveguide across a roof, it must be supported by at least ______ above the roof?

60. Radiation cable is useful in combined systems because of its wide bandwith, allowing operation from ________ MHz to more than _____ GHz (with some limitaions)

61. What are characteristics of Vicinity-integrated circuits cards (VICCs)

62. ______ GHz and above frequencies are used primarily in the private sector for PTP applications.

63. Encoders are not part of the Radio systems.

64. Coaxial cable has closely spaced slots in the inner conductor.

65. Antennas used in WLAN environments can be classified into what three categories?

66. ________ are used in both cabled and wireless network environments to link network access devices and extend the physical span or coverage zone of a network.

67. Ulta Wideband (UWB) is a wireless technologh designed for what and is based on what?

68. In Short Message Services a message must be no longer than _______ alphanumeric characters and contain no images or or graphics?

69. Some commonly retransmitted services of a DAS include everything but what?

70. Passive distrubution equipment in a DAS is defined as equipment that does require external power input.

71. When using radomes a path loss of ____ is common?

72. What are the three mor common forms of multiplexing?

73. ESMR is a propietary cellular network using frequencies within ______ MHz bands that had previously been used for fleet dispathch?

74. The role of an AP is to serve as a central point for communications and management on a WPAN.

75. What are the characteristics of Proximity integrated circuit cards (PICCs)?

76. In Metropolitan Environments some examples of wireless technologies are 900 MHz and orthogonal frequency division multiplexing (OFDM) technologies for indoor multipoint.

77. Typicall backend equipment consists of the following components: Signal converters and combiners, amplifiers and transeivers, antenna ports, antennas what are the other components?

31. Line of sight (LoS equipment requires an unobstructed path between _ or more points. The unobstructed path must include enough clearance for the ___ zone determined by the frequency of the radio?

46. Ultrahigh frequency (UHF)- cellular and trunk radio = _ to __?

60. Radiation cable is useful in combined systems because of its wide bandwith, allowing operation from ____ MHz to more than _ GHz (with some limitaions)