Ch. 18 * (Wireless) Flashcards Preview

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Flashcards in Ch. 18 * (Wireless) Deck (47)
0

Technology considerations for designing a WAN

Scalability
Compatibility
Standardization

1

Reliability

Accessibility

2

PAN

33'

3

MAN

50 miles

4

GAN

Satellite

5

LAN

Within building

6

IEEE 802.15.4

ZigBee

7

IEEE 802.16

WiMAX

8

WiMAX

Worldwide interoperability for microwave access

9

WiMAX

30 mph

10

IEEE 802.20

MBWA

11

MBWA

100 mph

12

Ultrahigh frequency (UHF)

300 - 3000 MHz

13

MF Spectrum group

Medium frequency

14

VHF

Very High Frequency

15

UHF

Ultra High Frequency

16

BPSK modulation technique

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

17

QPSK

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

18

CCK

Complementary Code Keying – 11 Mbps at 2.4 GHz

19

QAM

Quadrature Amplitude Modulation – two carriers at the same frequency

20

WLAN modulation techniques

BPSK
QPSK
CCK
QAM
Except "CDMA"

21

Heavy moisture

Disrupts RF signals

22

6 GHz and 11 GHz frequencies

Used for Public Safety

23

Antenna types

Except "trapezoidal"

24

DAS

Distributed Antenna System

25

The root of a DAS system (DAS Root)

Radio transceiver

26

DAS can consist of ___ or ___ antennas

Single or multiple

27

Five types of cable used in DAS

Singlemode
Multimode
Unshielded twisted-pair
Shielded twisted-pair
Coax cable

28

STP

Carries power for DAS

29

DAS antenna and frequency

Must be tuned

30

Common DAS services

Except "family radio service"

31

DAS topologies

Tapped-trunk
Star

32

First-generation DAS

Analog

34

Multiplexing techniques

Except "GDMA"

35

Time division duplex wireless transceiver

Transmits and receives alternately in sequential timeslots on a single frequency

36

5 GHz

Outdoor

37

DAS primary headend device

Master control unit (MCU)

38

TD – CDMA

Combination of TDMA and WCDMA

39

___ relationship between frequency and wavelength

Inverse

40

Rate at which periodic function repeats

Frequency

41

802.15

720 Kbps @ 2.4 GHz

42

802.20

High-speed connectivity at over 100 mph

43

Ultra wideband

Short range PANs
802.15.3a

44

Limited time WLAN for small number of devices

IBSS

45

When a single AP manages two or more wireless stations

BSS

46

Bluetooth standard

802.15

47

Central point of management on WLAN

AP