Deck 11: Wireless Networks

Question 1

A piconet is _____.

A)an extremely small LAN
B)a LAN with extremely low data rates
C)a net used to capture pictures
D)a Bluetooth master device together with the slave devices controlled by this master

Answer 1

D

Question 2

In wireless communication,the term ISM stands for _____.

A)intelligence,self-confidence and merit
B)industrial,scientific and medical
C)integrity,solidarity and method
D)insight,sincerity and might

Answer 2

B

Question 3

The potential disadvantages of wireless networks include all of the following except _____.

A)reliability
B)costs
C)data rates
D)security

Answer 3

B

Question 4

In a wireless LAN,the area covered by a single access point is a _____.

A)basic service area BSA)
B)distribution system DS)
C)extended service set ESS)
D)portal

Question 5

The potential advantages of wireless LANs include all of the following except _____.

A)reliability
B)lower installation costs
C)user convenience
D)quick installation

Question 6

The goal of 802.11n is to _____.

A)improve the data rates of wireless LANs
B)improve the security of wireless LANs
C)reduce the configuration requirements for wireless LANs
D)fix bugs in wireless LAN technologies

Question 7

The popular term Wi-Fi is a synonym for _____.

A)wireless personal area networks
B)wireless telephone networks
C)wireless metropolitan area networks
D)wireless local area networks

Question 8

Any packet format changes required when the frame leaves the wireless LAN are done by the _____.

A)distribution system DS)
B)access point AP)
C)portal
D)basic service set BSS)

Question 9

CSMA/ CA stands for _____.

A)control signal multiple access with collision alertness
B)carrier sense multiple access with collision avoidance
C)carrier sense mediated access with collision alertness
D)control signal mediated access with collision avoidance

Question 10

Wireless LANs use wireless frequencies in the _____ frequency band.

A)Ku
B)Ka
C)ISM
D)L

Question 11

All of the following are ISM frequency bands except _____.

A)915 MHz
B)2)45 GHz
C)5)8 GHz
D)50 GHz

Question 12

All of the following are differences between wireless and wired LANs except _____.

A)wireless LANs do not use CRC for error-detection
B)wireless LANs have no well-defined boundaries
C)the coverage areas of wireless LANs can overlap
D)different users of the same wireless LAN may operate at different data rates

Question 13

In wireless LANs,when a station is ready to transmit data,it _____.

A)sends the data right away
B)sends the data as soon as the medium becomes idle
C)sends the data a little after the medium becomes idle
D)sends the data after waiting after a random delay

Question 14

Wireless LAN technologies are defined by the ____ group of standards.

A)ITU X.25
B)ITU T.40
C)IEEE 802.3
D)IEEE 802.11

Question 15

To secure wireless LANs,the current recommendation is to _____.

A)use passwords
B)use wired equivalent privacy WEP)
C)ignore security risks
D)use Wi-Fi protected access WPA-2)

Question 16

The goal of wireless personal area networks is to _____.

A)provide high speed Internet access to laptops
B)eliminate cable clutter around computing devices
C)improve the security of wireless LANs
D)extend the range of wireless LANs

Question 17

In a wireless LAN,when a user moves from one basic service set BSS)to another BSS within the same extended service set ESS),typically _____.

A)its IP address changes,but the subnet membership remains the same
B)it remains in the same subnet,with the same IP address
C)both the IP address and subnet membership change
D)None of the above

Question 18

You have invented a new device that can rapidly flip book pages and scan the pages.To connect this device to a computer for archiving the scanned data,the most suitable wireless technology is _____.

A)IEEE 802.3
B)IEEE 802.11
C)IEEE 802.15
D)IEEE 802.16

Question 19

All of the following are among the three popular categories of wireless networks available for end users except _____.

A)personal area networks
B)local area networks
C)Ethernet
D)metropolitan area networks

Question 20

In the US,the agency that determines the uses of frequency bands is _____.

A)the Federal Communications Commission FCC)
B)the Federal Trade Commission FTC)
C)the National Science Foundation NSF)
D)the Securities and Exchange Commission SEC)

Question 21

WiMAX is another name for _____.

A)wireless local area networks 802.11)
B)wireless metropolitan area networks 802.16)
C)wireless personal area networks 802.15)
D)wired local area networks 802.3)

Question 22

You wish to offer low cost Internet connectivity to homes and businesses in a wealthy suburb.The most suitable wireless technology for the purpose is _____.

A)wireless local area networks 802.11)
B)wireless personal area networks 802.15)
C)wireless metropolitan area networks 802.16)
D)wired local area networks 802.3)

Question 23

You wish to offer low cost Internet and phone connectivity to homes in an underdeveloped country.The most suitable wireless technology for the purpose is _____.

A)wireless local area networks 802.11)
B)wireless personal area networks 802.15)
C)wired local area networks 802.3)
D)wireless metropolitan area networks 802.16)

Question 24

The highest data rates possible in wireless metropolitan area networks IEEE 802.16 networks)are _____.

A)1 mbps
B)11 mbps
C)54 mbps
D)Over 100 mbps

Question 25

The maximum data rate possible in Bluetooth is _____.

A)up to 20 mbps
B)up to 1 mbps
C)up to 54 mbps
D)up to 100 mbps