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Chapters 5 Through 8
Chapter
5 - Wireless Personal Area Networks
TRUE/FALSE
1. WPAN technologies are designed to connect
devices that are typically up to 10 meters apart.
2. One of the advantages of WPAN technologies is
their conservative use of battery power.
3. The first step in the Bluetooth pairing
process is the paging procedure.
4. A reduced-function device can only connect to
one full-function device on the network.
5. Bluetooth uses a challenge-response strategy
for device authentication.
MULTIPLE
CHOICE
1. Which of the following is NOT a likely
application for WPAN technologies?
|
a.
|
home
control systems
|
c.
|
industrial
control systems
|
|
b.
|
video
streaming
|
d.
|
security
systems
|
2. Which of the following is true about WPAN
standards?
|
a.
|
IEEE
developed standards for protocols above layer 2
|
c.
|
IEEE
802.15.1 is the Bluetooth standard
|
|
b.
|
industry
alliances developed specifications for layers 1 and 2
|
d.
|
802.16n
is the ZigBee standard
|
3. Which of the following is true about the OSI
model and IEEE 802?
|
a.
|
the
PMD is part of the Data Link layer
|
c.
|
the
LLC is part of the Physical layer
|
|
b.
|
the
PLCP formats data received from the MAC
|
d.
|
the
MAC layer is responsible for establishing connectivity to the local network
|
4. Which radio frequency band does Bluetooth
use?
|
a.
|
2.4
GHz ISM
|
c.
|
2.0
GHz ISM
|
|
b.
|
5.0
GHz ISM
|
d.
|
4.2
GHz ISM
|
5. Which of the following is true about the
Bluetooth protocol stack?
|
a.
|
the
L2CAP sits between Baseband and RF
|
c.
|
Link
Manager communicates directly with the Physical Radio
|
|
b.
|
the
Baseband layer sits atop the RF layer
|
d.
|
The
RF layer communicates between the Link Manager and L2CAP
|
6. What feature available in some Bluetooth
devices increases data rates to 2.1 or 3 Mbps?
|
a.
|
Link
Manager
|
c.
|
L2CAP
|
|
b.
|
radio
module
|
d.
|
EDR
|
7. Which Bluetooth power class allows
transmission ranges up to 330 feet?
|
a.
|
Power
Class 1
|
c.
|
Power
Class 3
|
|
b.
|
Power
Class 2
|
d.
|
Power
Class 4
|
8. Bluetooth 1.x uses a variation of which
modulation technique?
|
a.
|
PSK
|
c.
|
FSK
|
|
b.
|
ASK
|
d.
|
GSK
|
9. What feature of Bluetooth version 3.0 uses a
separate radio module that transmits using the same methods as IEEE 802.11?
|
a.
|
BLE
|
c.
|
AMP
|
|
b.
|
ULP
|
d.
|
NFC
|
10. Which transmission technique is used by
Bluetooth devices?
|
a.
|
Narrowband
|
c.
|
DHSS
|
|
b.
|
FHSS
|
d.
|
UWB
|
11. Which feature of Bluetooth version 1.2 allows
Bluetooth networks to coexist with 802.11 networks with a minimum of
interference?
|
a.
|
adaptive
frequency hopping
|
c.
|
alternate
MAC/PHY
|
|
b.
|
frequency
hopping spread spectrum
|
d.
|
Bluetooth
low energy
|
12. What is created when a Bluetooth network has
one master and at least one slave using the same channel?
|
a.
|
scatternet
|
c.
|
piconet
|
|
b.
|
wi-fi
net
|
d.
|
bluenet
|
13. How is the master device determined in a
Bluetooth network?
|
a.
|
the
device with the lowest address number
|
c.
|
the
first device to send out an inquiry message to discover other devices
|
|
b.
|
the
device with the highest priority hop sequence on the piconet
|
d.
|
the
device that carries out a paging procedure and establishes a connection
|
14. Which of the following is NOT a field in a
Bluetooth frame?
|
a.
|
Access
code
|
c.
|
Header
|
|
b.
|
Frame
check sequence
|
d.
|
Payload
|
15. Which of the following is NOT a Bluetooth
error correction scheme?
|
a.
|
1/3
rate FEC
|
c.
|
ARQ
|
|
b.
|
2/3
rate FEC
|
d.
|
CRC
|
16. In which Bluetooth power mode is only the
slave device’s internal timer running?
|
a.
|
active
mode
|
c.
|
hold
mode
|
|
b.
|
sniff
mode
|
d.
|
park
mode
|
17. Which of the following is true about the
ZigBee standard?
|
a.
|
designed
to support mesh networking
|
c.
|
used
for larger data transfers than Bluetooth
|
|
b.
|
replaced
an existing global, open standard
|
d.
|
operates
in the 5.0 and 6.5 GHz ISM bands
|
18. Which layer in a ZigBee device is responsible
for detecting the presence of an RF signal in the currently selected channel?
|
a.
|
LLC
|
c.
|
MAC
|
|
b.
|
PHY
|
d.
|
Upper
|
19. Which task is the MAC layer responsible for
in an 802.15.4 device?
|
a.
|
turning
the radio transceiver on and off
|
c.
|
association
and disassociation
|
|
b.
|
analyzing
link quality
|
d.
|
selecting
a frequency channel for operation
|
20. Which type of ZigBee device controls the
network in a star topology?
|
a.
|
all
end-node devices
|
c.
|
full-function
device
|
|
b.
|
reduced
function device
|
d.
|
PAN
coordinator
|
COMPLETION
1. In a ZigBee tree topology, if a child loses
it connection with its FFD, it becomes a(n) _____________.
2. ________________ is an 802.15.4-based
technology that implements IPv6 on WPANs and supports mesh networking.
3. A ______________ authority is a private
company that verifies the authenticity of each user in order to discourage
fraud.
4. In Bluetooth Encryption Mode ______, all
traffic is encrypted.
5. 802.15.4 provides for _______________
integrity, a technique that uses a message integrity code.
MATCHING
|
a.
|
8-DPSK
|
f.
|
inquiry
procedure
|
|
b.
|
ACL
link
|
g.
|
MIC
|
|
c.
|
ARQ
|
h.
|
modulation
index
|
|
d.
|
binding
|
i.
|
sequential
freshness
|
|
e.
|
guaranteed
time slots
|
j.
|
superframe
|
1. a reserved period for critical devices to
transmit priority data
2. a simple method of phase shift keying that
uses eight degrees of phase to encode tribits
3. the process of establishing a relationship
between endpoints in a ZigBee network
4. a security service available in 802.15.4 and
used by the receiving device
5. a process that enables a device to discover
which devices are in range
6. a packet-switched link that is used for data
transmissions
7. the amount that the frequency varies
8. an error-correction scheme that continuously
retransmits until an acknowledgment is received or a timeout value is exceeded
9. a mechanism for managing transmissions in a
piconet
10. a code composed of a subset of the data, the
length of the data, and the symmetric key
SHORT
ANSWER
1. What are the three types of addresses used in
a Bluetooth piconet? Describe each.
2. Describe the two types of physical links
between Bluetooth devices.
3. What are the two types of network access used
in IEEE 802.15.3 networks? Describe
them.
4. List three of the seven tasks the 802.15.4
MAC layer is responsible for.
5. What are the four levels of addresses for
identifying devices within a ZigBee PAN?
6. What is a cluster tree topology and how do
they compare to mesh networks?
7. How is power management implemented in a
ZigBee network?
8. Describe the WirelessHART technology.
9. List and describe the three levels of
Bluetooth security.
10. What is the process that ZigBee WPANs use for
authentication and encryption? Describe
how it works.
Chapter
6 - High-Rate Wireless Personal Area Networks
TRUE/FALSE
1. IEEE 802.15 covers all the WPAN working
groups.
2. The WHDI consortium developed the WHDI
specification primarily for the delivery of data produced from online database
queries.
3. The piconet coordinator in a WirelessHD
network should be a battery operated device for mobility.
4. 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.
5. UWB is capable of handling multiple data
streams, including HD television.
MULTIPLE
CHOICE
1. Which IEEE standard enables multimedia
connectivity between mobile and fixed consumer devices within the home?
|
a.
|
802.15.3c
|
c.
|
802.15.1
|
|
b.
|
802.15.5
|
d.
|
802.15.4
|
2. In which frequency range does WHDI operate?
|
a.
|
2.4
GHz
|
c.
|
5
GHz
|
|
b.
|
800
MHz
|
d.
|
400
KHz
|
3. Which of the following is true about WiGig?
|
a.
|
it
is compatible with 802.11ac
|
c.
|
makes
use of technology designed by AMIMON
|
|
b.
|
it
requires layer 3 and 4 protocols for audiovisual support
|
d.
|
it
has adopted the 802.15.3c standard for multimedia distribution
|
4. What does WiGig use to maintain reliable
connections at very high frequencies?
|
a.
|
single-carrier
modulation
|
c.
|
OFDM
|
|
b.
|
beamforming
|
d.
|
protocol
adaptation layers
|
5. What technique does WirelessHD employ to
support data rates over 25 Gbps?
|
a.
|
LRP
|
c.
|
HDMI
|
|
b.
|
spatial
multiplexing
|
d.
|
beamforming
|
6. Which of the following is true about a WVAN
piconet?
|
a.
|
the
piconet relies on an access point
|
c.
|
large
non-mobile devices like TVs are not part of a piconet
|
|
b.
|
the
PNC is typically a mobile device such as a tablet computer
|
d.
|
the
PNC is the first sink device in the area
|
7. 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
|
c.
|
neighbor
piconet
|
|
b.
|
parent
piconet
|
d.
|
subordinate
piconet
|
8. 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
|
c.
|
data
transport includes QoS
|
|
b.
|
PNC
can be queried about other devices
|
d.
|
infrastructure
mode networking is supported
|
9. Which part of an 802.15.3 superframe is used
for association and command communication?
|
a.
|
contention
access period
|
c.
|
channel
time allocation period
|
|
b.
|
beacon
|
d.
|
management
channel time allocation
|
10. What type of transmission method does an
802.15.3 piconet use during the CTAP?
|
a.
|
SDMA
|
c.
|
FDMA
|
|
b.
|
TDMA
|
d.
|
CDMA
|
11. Which field of the 802.15.3 MAC frame format
is used to reassemble a file in the correct sequence?
|
a.
|
Frame
control
|
c.
|
Fragmentation
control
|
|
b.
|
Piconet
ID
|
d.
|
Stream
index
|
12. 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
|
c.
|
PSPS
|
|
b.
|
APS
|
d.
|
APCI
|
13. Which radio band does the 802.15.3c standard
use?
|
a.
|
5.0
GHz
|
c.
|
2.4
GHz
|
|
b.
|
60
GHz
|
d.
|
p00
MHz
|
14. How many channels and what is the width of
each 802.15.3c channel?
|
a.
|
4, 2
GHz
|
c.
|
11,
25 MHz
|
|
b.
|
6,
200 MHz
|
d.
|
14,
50 MHz
|
15. Which of the following is NOT a 802.15.3c PHY
layer enhancement?
|
a.
|
passive
scanning
|
c.
|
channel
energy detection
|
|
b.
|
parity
bit error detection
|
d.
|
transmit
power control
|
16. The RF modulation techniques used for
802.15.3c are variations of which of the following?
|
a.
|
QAM
and PSK
|
c.
|
NRZ-L
and NRZ-I
|
|
b.
|
FSK
and ASK
|
d.
|
BPSK
and QPSK
|
17. In the WirelessHD specification 1.1, Which of
the following is NOT a function of the higher protocol layers?
|
a.
|
video
format selection
|
c.
|
device
discovery
|
|
b.
|
clock
synchronization
|
d.
|
video
and audio encoding and decoding
|
18. What application has UWB been used for since
the 1960’s?
|
a.
|
video
streaming
|
c.
|
cellular
phone towers
|
|
b.
|
ground-penetrating
radar
|
d.
|
automobile
speed detectors
|
19. 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
|
c.
|
direct-sequence
UWB
|
|
b.
|
mesh
networking
|
d.
|
impulse
modulation
|
20. What type of attack on a Bluetooth device can
access contact lists without the user’s knowledge?
|
a.
|
bluejacking
|
c.
|
bluesnarfing
|
|
b.
|
bluespoofing
|
d.
|
blueDoS
|
COMPLETION
1. The IEEE 802.15.3c standard enables
________________ connectivity between mobile and fixed consumer devices within
the home.
2. The WHDI specification is designed to mirror
the screens of multiple devices to the TV screen with the use of ____________.
3. _____________________ uses multiple radios
and antennas to steer a signal in the direction of the receiver.
4. ZigBee uses a(n) _______________ encryption
key for network-wide communications.
5. Security for IEEE 802.15.3 HR WPANs is based
on ________________, a symmetric key encryption mechanism.
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