Deck 5: Wireless Personal Area Networks

Question 1

One of the advantages of WPAN technologies is their conservative use of battery power.

Answer 1

True

Question 2

A reduced-function device can only connect to one full-function device on the network.

Answer 2

True

Question 3

What is created when a Bluetooth network has one master and at least one slave using the same channel?

A) scatternet
B) wi-fi net
C) piconet
D) bluenet

Answer 3

C

Question 4

What feature available in some Bluetooth devices increases data rates to 2.1 or 3 Mbps?

A) Link Manager
B) radio module
C) L2CAP
D) EDR

Question 5

Which Bluetooth power class allows transmission ranges up to 330 feet?

A) Power Class 1
B) Power Class 2
C) Power Class 3
D) Power Class 4

Question 6

How is the master device determined in a Bluetooth network?

A) the device with the lowest address number
B) the device with the highest priority hop sequence on the piconet
C) the first device to send out an inquiry message to discover other devices
D) the device that carries out a paging procedure and establishes a connection

Question 7

Which of the following is NOT a likely application for WPAN technologies?

A) home control systems
B) video streaming
C) industrial control systems
D) security systems

Question 8

Bluetooth 1.x uses a variation of which modulation technique?

A) PSK
B) ASK
C) FSK
D) GSK

Question 9

The first step in the Bluetooth pairing process is the paging procedure.

Question 10

Which radio frequency band does Bluetooth use?

A) 2.4 GHz ISM
B) 5.0 GHz ISM
C) 2.0 GHz ISM
D) 4.2 GHz ISM

Question 11

What feature of Bluetooth version 3.0 uses a separate radio module that transmits using the same methods as IEEE 802.11?

A) BLE
B) ULP
C) AMP
D) NFC

Question 12

Which of the following is true about the OSI model and IEEE 802?

A) the PMD is part of the Data Link layer
B) the PLCP formats data received from the MAC
C) the LLC is part of the Physical layer
D) the MAC layer is responsible for establishing connectivity to the local network

Question 13

Which of the following is true about the Bluetooth protocol stack?

A) the L2CAP sits between Baseband and RF
B) the Baseband layer sits atop the RF layer
C) Link Manager communicates directly with the Physical Radio
D) The RF layer communicates between the Link Manager and L2CAP

Question 14

Which of the following is true about WPAN standards?

A) IEEE developed standards for protocols above layer 2
B) industry alliances developed specifications for layers 1 and 2
C) IEEE 802.15.1 is the Bluetooth standard
D) 802.16n is the ZigBee standard

Question 15

Which of the following is NOT a Bluetooth error correction scheme?

A) 1/3 rate FEC
B) 2/3 rate FEC
C) ARQ
D) CRC

Question 16

Bluetooth uses a challenge-response strategy for device authentication.

Question 17

WPAN technologies are designed to connect devices that are typically up to 10 meters apart.

Question 18

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
B) frequency hopping spread spectrum
C) alternate MAC/PHY
D) Bluetooth low energy

Question 19

Which transmission technique is used by Bluetooth devices?

A) Narrowband
B) FHSS
C) DHSS
D) UWB

Question 20

Which of the following is NOT a field in a Bluetooth frame?

A) Access code
B) Frame check sequence
C) Header
D) Payload

Question 21

In which Bluetooth power mode is only the slave device's internal timer running?

A) active mode
B) sniff mode
C) hold mode
D) park mode

Question 22

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
a packet-switched link that is used for data transmissions

Question 23

In a ZigBee tree topology, if a child loses it connection with its FFD, it becomes a(n) _____________.

Question 24

What are the three types of addresses used in a Bluetooth piconet? Describe each.

Question 25

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
a reserved period for critical devices to transmit priority data

Question 26

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
the process of establishing a relationship between endpoints in a ZigBee network

Question 27

Which of the following is true about the ZigBee standard?

A) designed to support mesh networking
B) replaced an existing global, open standard
C) used for larger data transfers than Bluetooth
D) operates in the 5.0 and 6.5 GHz ISM bands

Question 28

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
the amount that the frequency varies

Question 29

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
a code composed of a subset of the data, the length of the data, and the symmetric key

Question 30

Which layer in a ZigBee device is responsible for detecting the presence of an RF signal in the currently selected channel?

A) LLC
B) PHY
C) MAC
D) Upper

Question 31

In Bluetooth Encryption Mode ______, all traffic is encrypted.

Question 32

Which type of ZigBee device controls the network in a star topology?

A) all end-node devices
B) reduced function device
C) full-function device
D) PAN coordinator

Question 33

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
a process that enables a device to discover which devices are in range

Question 34

A ______________ authority is a private company that verifies the authenticity of each user in order to discourage fraud.

Question 35

________________ is an 802.15.4-based technology that implements IPv6 on WPANs and supports mesh networking.

Question 36

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
a mechanism for managing transmissions in a piconet

Question 37

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
a security service available in 802.15.4 and used by the receiving device

Question 38

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
a simple method of phase shift keying that uses eight degrees of phase to encode tribits

Question 39

Which task is the MAC layer responsible for in an 802.15.4 device?

A) turning the radio transceiver on and off
B) analyzing link quality
C) association and disassociation
D) selecting a frequency channel for operation

Question 40

MATCHING
a. 8-DPSK
b. ACL link
c. ARQ
d. binding
e. guaranteed time slots
f. inquiry procedure
g. MIC
h. modulation index
i. sequential freshness
j. superframe
an error-correction scheme that continuously retransmits until an acknowledgment is received or a timeout value is exceeded

Question 41

List and describe the three levels of Bluetooth security.

Question 42

Describe the two types of physical links between Bluetooth devices.

Question 43

What is the process that ZigBee WPANs use for authentication and encryption? Describe how it works.

Question 44

Describe the WirelessHART technology.

Question 45

What are the two types of network access used in IEEE 802.15.3 networks? Describe them.

Question 46

How is power management implemented in a ZigBee network?

Question 47

List three of the seven tasks the 802.15.4 MAC layer is responsible for.

Question 48

What is a cluster tree topology and how do they compare to mesh networks?

Question 49

What are the four levels of addresses for identifying devices within a ZigBee PAN?