Question 1

At the lowest level of the Bluetooth protocol stack is the ______ layer.

Accepted Answer

A)  RF 
B)  LMP 
C)  TCP/IP 
D)  IR A

Question 2

What is the maximum data-transmission rate for ZigBee?

Accepted Answer

A)  2 Mbps 
B)  723.5 Kbps 
C)  250 Kbps 
D)  40 Kbps A

Question 3

The _________ period is when ZigBee devices have time reserved for priority transmissions.

Accepted Answer

A)  contention access 
B)  guaranteed time slot 
C)  beacon 
D)  time synchronization B

Question 4

Which method of Bluetooth transmission uses two different frequencies to indicate whether the bit is a 1 or a 0?

Accepted Answer

A)  DSSS 
B)  FHSS 
C)  GFSK 
D)  DPSK

Question 5

What is the name of the organization that develops and promotes Bluetooth products and consists of over 2,500 hardware and software vendors?

Accepted Answer

A)  Bluetooth SIG 
B)  IEEE 802.15.1 Task Group 
C)  Bluetooth TIA 
D)  Bluetooth Standards Organization

Question 6

Which of the following topologies are supported by ZigBee?

Accepted Answer

A)  scatternet and SCO 
B)  tree, star, and mesh 
C)  inverted tree and ACL 
D)  piconet and master/slave

Question 7

What type of security is provided for in the ZigBee specification?

Accepted Answer

A)  encryption 
B)  MIC 
C)  short-range communications 
D)  ACLs 
E)  All of the above

Question 8

Which of the following is a feature of WPAN devices?

Accepted Answer

A)  They can transmit signals at a great distance. 
B)  They are small and can operate on batteries. 
C)  They transmit signals that do not penetrate walls. 
D)  Their users cannot roam.

Question 9

The amount that the Bluetooth frequency varies, which is between 280 KHz and 350 KHz, is called the ________.

Accepted Answer

A)  direct sequence 
B)  modulation index 
C)  hopping sequence 
D)  i-phase

Question 10

Which frequency band(s) can ZigBee networks utilize?

Accepted Answer

A)  ISM 
B)  U-NII 
C)  3.1 GHz 
D)  60 GHz 
E)  All of the above

Question 11

Which of the following topologies are supported by Bluetooth?

Accepted Answer

A)  scatternet and piconet 
B)  ACL and SCO 
C)  WMAN and WLAN 
D)  star and cluster tree

Question 12

The lower levels of the WPAN protocol stack are implemented in the _____.

Accepted Answer

A)  software 
B)  hardware 
C)  IR 
D)  data link layer

Question 13

Which of the following is not a feature of Bluetooth?

Accepted Answer

A)  power-saving 
B)  master and slave changing roles 
C)  slave authenticates master 
D)  asymmetric transmission

Question 14

Which of the following is not an example of a Bluetooth communication?

Accepted Answer

A)  cellular phone to PDA 
B)  notebook computer to PDA 
C)  hard drive to memory 
D)  notebook computer to GPS

Question 15

A Bluetooth channel consists of _____________.

Accepted Answer

A)  a specific frequency channel 
B)  an IEEE 802.15.1 channel 
C)  a hopping sequence including up to 79 frequencies 
D)  a frequency range that the signal spreads across

Question 16

Bluetooth divides the 2.4 GHz frequency into 79 frequencies that are spaced how far apart?

Accepted Answer

A)  5 MHz 
B)  22 MHz 
C)  11 MHz 
D)  1 MHz

Exam 5: Low Rate Wireless Personal Area Networks