Deck 5: Low Rate Wireless Personal Area Networks

Question 1

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

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

Answer 1

A

Question 2

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

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

Answer 2

E

Question 3

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

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

Answer 3

C

Question 4

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

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

Question 5

A Bluetooth channel consists of _____________.

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 6

What is the maximum data-transmission rate for ZigBee?

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

Question 7

Which frequency band(s) can ZigBee networks utilize?

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

Question 8

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

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

Question 9

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

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

Question 10

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

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

Question 11

Which of the following is not a feature of Bluetooth?

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

Question 12

Which of the following topologies are supported by Bluetooth?

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

Question 13

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

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

Question 14

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

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

Question 15

Which of the following topologies are supported by ZigBee?

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

Question 16

Which of the following is a feature of WPAN devices?

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.