Deck 12: Personal, Metropolitan, and Wide Area Wireless Networks

Question 1

The "last mile connection" refers to an optical, wireless, point-to-point, line-of-sight wireless technology.

Answer 1

False

Question 2

What is the main drawback of 802.15.1 technology?

A) cost
B) speed
C) reliability
D) All of the above

Answer 2

B

Question 3

Mode ____ of IEEE 802.15.3 provides protection using digital certificates.

A) 0
B) 1
C) 2
D) 3

Answer 3

D

Question 4

What is an application of RFID technology?

A) Cards with embedded RFID chips are widely used as electronic cash in casinos
B) Major retailers are requiring that cases and pallets of merchandise shipped to their warehouses from large vendors have an RFID tag affixed
C) Beginning in 2005 U.S. passports will have an RFID tag embedded in the document
D) All of the above

Question 5

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

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

Question 6

What type of RFID tag operates at 2.45 GHz?

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

Question 7

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 8

Because 802.15.1 uses FHSS while 802.11b/g uses direct sequence spread spectrum (DSSS), there can be a conflict between devices. An IEEE task group known as ____ was formed to create a means by which these two technologies could coexist.

A) 802.15.1a
B) 802.15.2
C) 802.15.3
D) 802.15.99

Question 9

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

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

Question 10

The range for passive RFID tags is ____.

A) 10 millimeters up to 6 meters
B) 1 millimeter to 10 meters
C) 1 inch to 10 feet
D) 1 inch to 50 feet

Question 11

____ is another name for IEEE 802.15.3a.

A) Megaband
B) Bluetooth
C) Ultrawideband
D) Broadband

Question 12

The ZigBee group has drafted standards relating to network configuration, security, and other higher-level features that are not covered by the IEEE 802.15.4 standard.

Question 13

____ is the name given to a wireless technology that uses short-range RF transmissions.

A) Bluetooth
B) Netblue
C) PDA
D) RFID

Question 14

The angle at which the sending and receiving IrDA devices align or face each other is very important. When the two devices have a deflection angle of no more than ____ degrees, the distance between devices can be up to 1 meter.

A) 5
B) 15
C) 25
D) 35

Question 15

Although the use of satellites for personal wireless communication is fairly recent, satellites themselves have been used for worldwide communications for over 40 years.

Question 16

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

Question 17

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

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

Question 18

The security features for the 802.15.3 standard include key distribution and management and encryption using ____.

A) AES
B) DES
C) symmetric keys
D) public/private keys

Question 19

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

Question 20

Power consumption is so low for 802.15.4 devices that it is estimated that batteries powering the devices can last up to ____.

A) 4 months
B) 1 year
C) 2 years
D) 5 years

Question 21

What is a piconet?

Question 22

Where might a Multichannel Multipoint Distribution Service (MMDS) hub be located?

A) underground
B) first floor of a building
C) top of a mountain
D) by a window

Question 23

Describe the last mile connection problem.

Question 24

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

Question 25

The advantage of ____________________ networking systems is that devices configure themselves and are intelligent.

Question 26

____________________ 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 27

Describe IrDA.

Question 28

In a cellular telephone network all of the transmitters and cell phones operate at a(n) ____________________ power level.

Question 29

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

Question 30

Current costs to run a fiber optic cable can range as high as $____ per mile.

A) 200
B) 2,000
C) 20,000
D) 200,000

Question 31

What is the shape of cells in a cellular telephone network?

A) triangle
B) square
C) circle
D) hexagon

Question 32

A ____ satellite remains "fixed" over a given location on the earth and seems to hang motionless in space.

A) low earth orbiting
B) medium earth orbiting
C) high-earth orbiting
D) geosynchronous earth orbiting

Question 33

A Local Multipoint Distribution Service (LMDS) network is composed of ____.

A) piconets
B) masters and slaves
C) cells
D) subnets

Question 34

How does the MAC layer of WiMAX (Worldwide Interoperability for Microwave Access) differ from that used in IEEE 802.11a/b/g?

Question 35

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

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

Question 36

There are several significant differences between 802.15.3 and 802.15.1 (Bluetooth). What are they?

Question 37

What are the two different types of RFID tags?

Question 38

A(n) ____________________ transmission is for communication between one sender and multiple receivers.

Question 39

Describe wireless personal area networks.

Question 40

Describe a geosynchronous earth orbit.

Question 41

Describe the way cellular telephone networks work.