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Copied RCDD > Ch. 18 * (Wireless) > Flashcards

Ch. 18 * (Wireless) Flashcards

1
Q

Reliability

A

Accessibility

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2
Q

PAN

A

33’

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3
Q

MAN

A

50 miles

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4
Q

GAN

A

Satellite

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5
Q

LAN

A

Within building

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6
Q

IEEE 802.15.4

A

ZigBee

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7
Q

IEEE 802.16

A

WiMAX

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8
Q

WiMAX

A

Worldwide interoperability for microwave access

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9
Q

WiMAX

A

30 mph

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10
Q

IEEE 802.20

A

MBWA

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11
Q

MBWA

A

100 mph

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12
Q

Ultrahigh frequency (UHF)

A

300 - 3000 MHz

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13
Q

MF Spectrum group

A

Medium frequency

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14
Q

VHF

A

Very High Frequency

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15
Q

UHF

A

Ultra High Frequency

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16
Q

BPSK modulation technique

A

Binary Phase Shift Keying – two different phase angles (usually 180°)

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17
Q

QPSK

A

Quadrature phase shift keying – four different phase angles (usually 0, 90, 180, and 270°)

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18
Q

CCK

A

Complementary Code Keying – 11 Mbps at 2.4 GHz

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19
Q

QAM

A

Quadrature Amplitude Modulation – two carriers at the same frequency

20
Q

WLAN modulation techniques

A 
BPSK 
QPSK 
CCK
QAM 
Except "CDMA"
21
Q

Heavy moisture

A

Disrupts RF signals

22
Q

6 GHz and 11 GHz frequencies

A

Used for Public Safety

23
Q

Antenna types

A

Except “trapezoidal”

24
Q

DAS

A

Distributed Antenna System

25
Q

The root of a DAS system (DAS Root)

A

Radio transceiver

26
Q

DAS can consist of ___ or ___ antennas

A

Single or multiple

27
Q

Five types of cable used in DAS

A 
Singlemode 
Multimode 
Unshielded twisted-pair 
Shielded twisted-pair 
Coax cable
28
Q

STP

A

Carries power for DAS

29
Q

DAS antenna and frequency

A

Must be tuned

30
Q

Common DAS services

A

Except “family radio service”

31
Q

DAS topologies

A

Tapped-trunk

Star

32
Q

First-generation DAS

33
Q

Technology considerations for designing a WAN

A

Scalability
Compatibility
Standardization

34
Q

Multiplexing techniques

A

Except “GDMA”

35
Q

Time division duplex wireless transceiver

A

Transmits and receives alternately in sequential timeslots on a single frequency

36
Q

5 GHz

37
Q

DAS primary headend device

A

Master control unit (MCU)

38
Q

TD – CDMA

A

Combination of TDMA and WCDMA

39
Q

___ relationship between frequency and wavelength

40
Q

Rate at which periodic function repeats

41
Q

802.15

A

720 Kbps @ 2.4 GHz

42
Q

802.20

A

High-speed connectivity at over 100 mph

43
Q

Ultra wideband

A

Short range PANs

802.15.3a

44
Q

Limited time WLAN for small number of devices

45
Q

When a single AP manages two or more wireless stations

46
Q

Bluetooth standard

47
Q

Central point of management on WLAN

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