Deck 13: Other Wireless Networks

Question 1

What type of RFID tag operates at 2.45 GHz?

A) Ultrahigh frequency
B) Microwave
C) High frequency
D) Low frequency

Answer 1

B

Question 2

Free space optics (FSO)transmissions are sent by low-powered ____ beams through the open air.

A) infrared
B) fiber optic
C) RF
D) VLC

Answer 2

A

Question 3

A Bluetooth device in ____ mode is part of the piconet but is in a low-power state.

A) idle
B) inquire
C) page
D) park/hold

Answer 3

D

Question 4

If you are setting up a retail business and want to use the latest technology to make customer purchases as easy as possible at the checkout line,which technology are you most likely to deploy?

A) BAN
B) NFC
C) ZigBee
D) Bluetooth

Question 5

Active RFID tags do not require their own power source.

Question 6

Which technology is most likely found in applications such as smart lighting,temperature control,and smoke detection?

A) NFC
B) RFID
C) ZigBee
D) Bluetooth

Question 7

If multiple piconets cover the same area,a Bluetooth device can be a member in two or more overlaying piconets.

Question 8

The transmission speed of wireless personal area networks is higher than the other types of wireless networks.

Question 9

In a piconet,one device is the ____,and controls all of the wireless traffic.

A) active slave
B) slave
C) master
D) controller

Question 10

What is the recommended color for the window in an IrDA device?

A) red
B) amber
C) green
D) violet

Question 11

What type of wireless network is used for portable or stationary devices that are within 107 meters (350 feet)of each other or a centrally located access point?

A) WPAN
B) WLAN
C) WMAN
D) WWAN

Question 12

One of the drawbacks of the proposed 802.11ac standard is an expected lower battery life for wireless devices using this standard.

Question 13

Which of the following is NOT considered a low data rate technology?

A) RFID
B) UWB
C) ZigBee
D) NFC

Question 14

A BAN is a network system of devices in close proximity to a person's body.

Question 15

Which of the following was a result of a group formed to investigate a high-rate WPAN due to the weaknesses of Bluetooth?

A) UWB
B) piconet
C) ZigBee
D) RFID

Question 16

Which of the following is NOT true of the Bluetooth technology?

A) it uses FHSS
B) it uses the 5.0 GHz spectrum
C) it is a short-range technology
D) Bluesnarfing is a type of attack on a Bluetooth device

Question 17

Which of the following is NOT true about IrDA technology?

A) speed does not vary with distance
B) transmission uses lasers
C) devices cannot send and receive at the same time
D) ambient light can impact transmissions

Question 18

Which of the following is NOT true of broadband radio service?

A) used to transmit digital radio
B) can transmit video,voice,and data up to 1.5 Mbps
C) can be used as an alternative to cable TV
D) it uses narrowband RF

Question 19

Which technology is most likely found in applications such as asset tracking,Smart Keys,and toll collection?

A) Bluetooth
B) NFC
C) UWB
D) RFID

Question 20

Which of the following is true about free space optics?

A) primarily used for indoor applications
B) speeds are comparable to fiber optic
C) beams can be harmful to human eyes
D) link heads must be mounted outdoors

Question 21

Which of the following are features of Ultra-wideband? (Choose all that apply.)

A) four levels of security
B) coexistence with 802.15 WMANs
C) QoS
D) use of the 900 MHz spectrum

Question 22

Which of the following are Bluetooth piconet modes? (Choose all that apply.)

A) standby
B) idle
C) page
D) connected

Question 23

A group of piconets in which connections exist between different piconets is called a(n)____________________.

Question 24

Which of the following are advantages of VLC? (Choose all that apply.)

A) signals are spread wide for large coverage
B) visible light is not harmful to humans
C) EMI does not impact VLC
D) strict regulations govern its use

Question 25

There are several advantages of free space optics (FSO)compared to fiber optic and RF systems.List and describe them.

Question 26

A variation of MIMO,known as ________________ is implemented in 802.11ac.

Question 27

What technology does LTE use to achieve higher data rates?

A) OFDM
B) CSMA/CD
C) FHSS
D) WiMax

Question 28

List the five modes in a Bluetooth piconet.

Question 29

______________ devices are used in contactless payment systems.

Question 30

List and describe the two different types of RFID tags?

Question 31

List the advantages of broadband radio service (BRS).

Question 32

____________________ RFID tags do not have their own power supply.Instead,the tiny electrical current induced in the antenna by the incoming signal from the transceiver provides enough power for the tag to send a response.

Question 33

Describe visible light communications (VLC).

Question 34

Slave devices that are connected to the piconet and are sending transmissions are
known as __________________ slaves.

Question 35

Describe wireless personal area networks.

Question 36

List three applications for RFID.

Question 37

Which of the following are advantages of FSO? (Choose all that apply.)

A) immune to atmospheric disturbances
B) good security
C) fast installation
D) scalable transmission speed

Question 38

Which of the following are true about the 802.11ac standard? (Choose all that apply.)

A) it will operate in the 5 GHz spectrum
B) uses channel bandwidths up to 80 MHz
C) enhances the SISO technology used in 802.11n
D) transmit beam forming is a standard feature

Question 39

What is a Bluetooth piconet?

Question 40

List and describe three technologies in 802.11ac.

Question 41

Describe the WiMAX MAC layer.