True/False
Indicate whether the sentence or statement is true
or false.
|
|
|
1.
|
The
transmission speed of wireless personal area networks is higher than the other types of
networks.
|
|
|
2.
|
If
multiple piconets cover the same area, a Bluetooth device can be a member in two or more overlaying
piconets.
|
|
|
3.
|
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.
|
|
|
4.
|
The
“last mile connection” refers to an optical, wireless, point-to-point, line-of-sight
wireless technology.
|
|
|
5.
|
Although the use of satellites for personal wireless communication is fairly recent,
satellites themselves have been used for worldwide communications for over 40 years.
|
Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
|
|
|
6.
|
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?
|
|
|
7.
|
____
is the name given to a wireless technology that uses short-range RF transmissions. a. | Bluetooth | c. | PDA | b. | Netblue | d. | RFID | | | | |
|
|
|
8.
|
In a
piconet, one device is the ____, and controls all of the wireless traffic. a. | active
slave | c. | master | b. | slave | d. | controller | | | | |
|
|
|
9.
|
A
device in ____ mode is part of the piconet but is in a low-power state. a. | standby | c. | page | b. | inquire | d. | park/hold | | | | |
|
|
|
10.
|
What
is the main drawback of 802.15.1 technology? a. | cost | c. | reliability | b. | speed | d. | All of the
above | | | | |
|
|
|
11.
|
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 | c. | 802.15.3 | b. | 802.15.2 | d. | 802.15.99 | | | | |
|
|
|
12.
|
The
security features for the 802.15.3 standard include key distribution and management and encryption
using ____. a. | AES | c. | symmetric
keys | b. | DES | d. | public/private
keys | | | | |
|
|
|
13.
|
Mode
____ of IEEE 802.15.3 provides protection using digital certificates.
|
|
|
14.
|
____
is another name for IEEE 802.15.3a. a. | Megaband | c. | Ultrawideband | b. | Bluetooth | d. | Broadband | | | | |
|
|
|
15.
|
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 | c. | 2 years | b. | 1
year | d. | 5
years | | | | |
|
|
|
16.
|
The
range for passive RFID tags is ____. a. | 10 millimeters up to 6 meters | c. | 1 inch to 10 feet | b. | 1 millimeter to
10 meters | d. | 1 inch to 50
feet | | | | |
|
|
|
17.
|
What
type of RFID tag operates at 2.45 GHz? a. | Ultrahigh frequency | c. | High frequency | b. | Microwave | d. | Low
frequency | | | | |
|
|
|
18.
|
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 | | |
|
|
|
19.
|
What
is the recommended color for the window in an IrDA device? a. | red | c. | green | b. | amber | d. | violet | | | | |
|
|
|
20.
|
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.
|
|
|
21.
|
Current costs to run a fiber optic cable can range as high as $____ per
mile. a. | 200 | c. | 20,000 | b. | 2,000 | d. | 200,000 | | | | |
|
|
|
22.
|
Free
space optics (FSO) transmissions are sent by low-powered ____ beams through the open
air. a. | infrared | c. | RF | b. | fiber optic | d. | wireless | | | | |
|
|
|
23.
|
A
Local Multipoint Distribution Service (LMDS) network is composed of ____. a. | piconets | c. | cells | b. | masters and slaves | d. | subnets | | | | |
|
|
|
24.
|
Where
might a Multichannel Multipoint Distribution Service (MMDS) hub be located? a. | underground | c. | top of a
mountain | b. | first floor of a building | d. | by a window | | | | |
|
|
|
25.
|
What
is the shape of cells in a cellular telephone network? a. | triangle | c. | circle | b. | square | d. | hexagon | | | | |
|
|
|
26.
|
A
____ satellite remains “fixed” over a given location on the earth and seems to hang
motionless in space. a. | low earth orbiting | c. | high-earth orbiting | b. | medium earth
orbiting | d. | geosynchronous
earth orbiting | | | | |
|
Completion
Complete each sentence or
statement.
|
|
|
27.
|
A(n)
____________________ transmission is for communication between one sender and multiple
receivers.
|
|
|
28.
|
A
group of piconets in which connections exist between different piconets is called a(n)
____________________.
|
|
|
29.
|
____________________ 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.
|
|
|
30.
|
In a
cellular telephone network all of the transmitters and cell phones operate at a(n)
____________________ power level.
|
|
|
31.
|
The
advantage of ____________________ networking systems is that devices configure themselves and are
intelligent.
|
Matching
|
|
|
Match each term with the correct statement below. a. | free space
optics | f. | WMAN | b. | scatternet | g. | backhaul connection | c. | WPAN | h. | WWAN | d. | Infrared Data Association | i. | mesh wireless network | e. | ZigBee
Alliance | | | | |
|
|
|
32.
|
can
figure out the best route for information to take across the network based on the quality required,
meaning a video stream could take a different route to a Webcam that requires much less
bandwidth
|
|
|
33.
|
designed for devices in a range of up to 50 kilometers (31 miles) using RF or infrared
transmission technology at a variety of speeds
|
|
|
34.
|
industry consortium composed of several major semiconductor vendors that is intended
to promote the 802.15.4 standard
|
|
|
35.
|
network designed for hand-held and portable devices at slow to moderate transmission
speeds
|
|
|
36.
|
company’s internal infrastructure connection between two or more remote
locations
|
|
|
37.
|
non-profit consortium with over 160 member companies that represent computer and
telecommunications hardware, software, components, and adapters
|
|
|
38.
|
wireless facility that connects networks in different parts of a country or of the
world
|
|
|
39.
|
group
of piconets in which connections exist between different piconets
|
|
|
40.
|
optical, wireless, point-to-point, line-of-sight wireless technology
|
Short Answer
|
|
|
41.
|
Describe wireless personal area networks.
|
|
|
42.
|
What
is a piconet?
|
|
|
43.
|
There
are several significant differences between 802.15.3 and 802.15.1 (Bluetooth). What are
they?
|
|
|
44.
|
What
are the two different types of RFID tags?
|
|
|
45.
|
Describe IrDA.
|
|
|
46.
|
Describe the last mile connection problem.
|
|
|
47.
|
There
are several advantages of free space optics (FSO) compared to fiber optic and RF systems. List
and describe them.
|
|
|
48.
|
How
does the MAC layer of WiMAX (Worldwide Interoperability for Microwave Access) differ from that used
in IEEE 802.11a/b/g?
|
|
|
49.
|
Describe the way cellular telephone networks work.
|
|
|
50.
|
Describe a geosynchronous earth orbit.
|