Deck 6: High-Rate Wireless Personal Area Networks

Question 1

In a piconet, the 802.15.3 PNC is primarily responsible for _______.

A) timing
B) acting as the router
C) switching
D) Internet connections

Answer 1

A

Question 2

In WirelessHD, the PNC is usually a video source.

Answer 2

False

Question 3

In WPANs, the _____ layer of the protocol stack handles the different types of traffic.

A) radio frequency
B) video
C) IP
D) adaptation

Answer 3

D

Question 4

In the 60 GHz band used in 802.15.3c, RF channels have approximately how much bandwidth?

A) 2 MHz
B) 500 MHz
C) 2 GHz
D) 5 MHz

Question 5

CAPs are optional.

Question 6

In 802.15.3, the lower levels of the protocol stack are implemented in the _____.

A) software
B) hardware
C) infrared
D) Data Link layer

Question 7

Which of the following technologies uses an RF frequency band in which signals can still get through walls?

A) WirelessHD
B) WHDI
C) WiGig
D) none of the above

Question 8

The beacon carries timing information for the piconet.

Question 9

A WiMedia device cannot request more channel time from the PNC.

Question 10

What is the generic name of the error-correction mechanism that is used to ensure the reliability of transmissions in HR WPANs?

A) FEC
B) CRC
C) parity
D) HRC

Question 11

In 802.15.3, frame collisions can only happen during the _____.

A) CTAP
B) MCTA
C) CTA
D) CAP

Question 12

UWB can cause interference with the frequency band used in _______.

A) ISM
B) 802.11a
C) 60 GHz
D) WirelessHD

Question 13

In 802.15.3c, using _____ prevents collisions.

A) CAP
B) CTAP
C) CSMA/CA
D) CSMA/CD

Question 14

The frequencies between approximately ______and ______form the entire range approved by the FCC for use with UWB technology.

A) 3.4 GHz; 4.5 GHz
B) 5.0 GHz; 9.2 GHz
C) 3.4 GHz; 10.3 GHz
D) 6.6 GHz; 9.2 GHz

Question 15

The maximum data rate of WiGig is _____ Gbps.

A) 1
B) 2
C) 7
D) 4.9

Question 16

How many RF channels are available in 802.15.3c?

A) 2
B) 14
C) 4
D) 11

Question 17

In the _______ power-saving mode, 802.15.3c devices must listen to the system-wide wake beacons.

A) SPSS
B) DSPS
C) PSPS
D) APS

Question 18

The name of the process used in ZigBee to ensure that the same frame is not transmitted more than once is ________________.

A) symmetric key
B) sequential freshness
C) man-in-the-middle
D) message integrity check

Question 19

Devices in an 802.15.3c piconet can only communicate through the PNC.

Question 20

The 802.15.3 standard was developed to __________ .

A) compete with Bluetooth technology
B) provide short-range PC networking
C) support multimedia
D) all of the above