Deck 6: High-Rate Wireless Personal Area Networks

Question 1

The WHDI consortium developed the WHDI specification primarily for the delivery of data produced from online database queries.

Answer 1

False

Question 2

The DSPS power saving mode allows devices to sleep for long periods of time until they choose to wake up and listen to a beacon.

Answer 2

False

Question 3

Which of the following is NOT an HR WPAN feature provided by the 802.15.3 MAC layer?

A) uses a one-octet device ID
B) PNC can be queried about other devices
C) data transport includes QoS
D) infrastructure mode networking is supported

Answer 3

D

Question 4

In which frequency range does WHDI operate?

A) 2.4 GHz
B) 800 MHz
C) 5 GHz
D) 400 KHz

Question 5

The piconet coordinator in a WirelessHD network should be a battery operated device for mobility.

Question 6

IEEE 802.15 covers all the WPAN working groups.

Question 7

UWB is capable of handling multiple data streams, including HD television.

Question 8

Which of the following is NOT a 802.15.3c PHY layer enhancement?

A) passive scanning
B) parity bit error detection
C) channel energy detection
D) transmit power control

Question 9

Which of the following is described as a piconet that has its own PNC but depends on the original piconet's PNC to allocate a private block of time when its devices are allowed to transmit?

A) child piconet
B) parent piconet
C) neighbor piconet
D) subordinate piconet

Question 10

What does WiGig use to maintain reliable connections at very high frequencies?

A) single-carrier modulation
B) beamforming
C) OFDM
D) protocol adaptation layers

Question 11

Which field of the 802.15.3 MAC frame format is used to reassemble a file in the correct sequence?

A) Frame control
B) Piconet ID
C) Fragmentation control
D) Stream index

Question 12

What type of transmission method does an 802.15.3 piconet use during the CTAP?

A) SDMA
B) TDMA
C) FDMA
D) CDMA

Question 13

Which 802.15.3 power-saving methods allows devices to sleep for the duration of several superframes and allows them to wake up in the middle of a superframe to transmit or receive data?

A) PSPS
B) APS
C) PSPS
D) APCI

Question 14

What technique does WirelessHD employ to support data rates over 25 Gbps?

A) LRP
B) spatial multiplexing
C) HDMI
D) beamforming

Question 15

Which of the following is true about WiGig?

A) it is compatible with 802.11ac
B) it requires layer 3 and 4 protocols for audiovisual support
C) makes use of technology designed by AMIMON
D) it has adopted the 802.15.3c standard for multimedia distribution

Question 16

Which of the following is true about a WVAN piconet?

A) the piconet relies on an access point
B) the PNC is typically a mobile device such as a tablet computer
C) large non-mobile devices like TVs are not part of a piconet
D) the PNC is the first sink device in the area

Question 17

Which radio band does the 802.15.3c standard use?

A) 5.0 GHz
B) 60 GHz
C) 2.4 GHz
D) p00 MHz

Question 18

Which IEEE standard enables multimedia connectivity between mobile and fixed consumer devices within the home?

A) 802.15.3c
B) 802.15.5
C) 802.15.1
D) 802.15.4

Question 19

Which part of an 802.15.3 superframe is used for association and command communication?

A) contention access period
B) beacon
C) channel time allocation period
D) management channel time allocation

Question 20

How many channels and what is the width of each 802.15.3c channel?

A) 4, 2 GHz
B) 6, 200 MHz
C) 11, 25 MHz
D) 14, 50 MHz

Question 21

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
a time-dependent transmission that must occur every frame or every so many
frames to maintain the quality of the connection

Question 22

What application has UWB been used for since the 1960's?

A) video streaming
B) ground-penetrating radar
C) cellular phone towers
D) automobile speed detectors

Question 23

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
uses a half-cycle positive analog pulse to represent a 1 and a half-cycle negative analog pulse to represent a 0

Question 24

_____________________ uses multiple radios and antennas to steer a signal in the direction of the receiver.

Question 25

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
periods of time allocated by the PNC to a specific device for prioritizing communications

Question 26

ZigBee uses a(n) _______________ encryption key for network-wide communications.

Question 27

In the WirelessHD specification 1.1, Which of the following is NOT a function of the higher protocol layers?

A) video format selection
B) clock synchronization
C) device discovery
D) video and audio encoding and decoding

Question 28

The WHDI specification is designed to mirror the screens of multiple devices to the TV screen with the use of ____________.

Question 29

Security for IEEE 802.15.3 HR WPANs is based on ________________, a symmetric key encryption mechanism.

Question 30

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
a mechanism used to communicate commands or any asynchronous data that may be present in a superframe

Question 31

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
time periods used for communication between the devices and the PNC

Question 32

What term is used for the technique in which the amplitude, polarity, or position of an analog pulse represents either a 1 or a 0?

A) biphase modulation
B) mesh networking
C) direct-sequence UWB
D) impulse modulation

Question 33

What type of attack on a Bluetooth device can access contact lists without the user's knowledge?

A) bluejacking
B) bluespoofing
C) bluesnarfing
D) blueDoS

Question 34

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
a secondary wireless video area network that operates in a different frequency channel

Question 35

The RF modulation techniques used for 802.15.3c are variations of which of the following?

A) QAM and PSK
B) FSK and ASK
C) NRZ-L and NRZ-I
D) BPSK and QPSK

Question 36

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
a mechanism for managing transmissions in a piconet

Question 37

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
a technique that uses multiple radios and multiple antennas to transmit and receive different parts of the same PHY frame

Question 38

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
the home or parent WVAN

Question 39

MATCHING
a. biphase modulation
b. channel time allocations
c. contention access period
d. D-WVAN
e. H-WVAN
f. isochronous
g. MCTA
h. PNC
i. spatial multiplexing
j. superframe
a device that provides all the basic communications timing in an 802.15.3 piconet

Question 40

The IEEE 802.15.3c standard enables ________________ connectivity between mobile and fixed consumer devices within the home.

Question 41

Briefly discuss the potential of spectrum conflict with WPANs.

Question 42

Describe child and neighbor piconets.

Question 43

What do the PALs do for WiGig?

Question 44

What was the primary purpose the WHDI consortium developed the WHDI specification?

Question 45

What are the three sections the WirelessHD specification divides the PHY layer into?

Question 46

Describe the three parts of an 802.15.3 superframe.

Question 47

Provide a summary of the purpose and application for IEEE 802.15.3c.

Question 48

List and describe the two modes of security for IEEE 802.15.3 HR WPANs.

Question 49

List four potential HR WPAN applications.

Question 50

What information is contained in the Frame control field of an 802.15.3 frame?