Deck 6: Connecting Through a Wireless Network

Question 1

Infrared light is susceptible to interference from RFI and EMI.

Answer 1

False

Question 2

The transmission speeds in the 802.11 group of wireless standards correspond to the Physical layer of the OSI model.

Answer 2

True

Question 3

Terrestrial microwave transmissions require the operator to obtain an FCC license.

Answer 3

True

Question 4

Both priority-based access and Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)function at the ____ layer of the OSI model.

A)Transport
B)Physical
C)Network
D)Data Link

Question 5

In ____ system authentication, any two stations can authenticate with each other.

A)open
B)closed
C)selective
D)binary

Question 6

In the early 1980s, a technology called ____ radio emerged to network PCs over radio waves.

A)CB
B)digital
C)amateur
D)packet

Question 7

In the United States, network signals may be transmitted in the frequency range of 902-928 MHz.

Question 8

Bluetooth uses ____,which means that packets are sent in alternating directions using time slots.

A)code division multiplexing
B)time division duplexing
C)time division multiplexing
D)code division duplexing

Question 9

____ communications occur in discrete units with a start bit at the front and a stop bit at the back.

A)Timed
B)Synchronous
C)Asynchronous
D)Modular

Question 10

Two stations disconnect when either station sends a ____ notice.

A)denial
B)deauthentication
C)deactivation
D)termination

Question 11

The ____ is a value that defines a logical network for all devices that belong to it.

A)WEP encryption key
B)service set identifier
C)preshared key
D)shared key

Question 12

The ____ standard supports three transmission technologies on the 2.4 GHz band.

A)802.11a
B)802.11b
C)802.11c
D)802.11g

Question 13

One ____ represents a radiated alternating current or emission of one cycle per second.

A)Angstrom
B)Hertz
C)nanometer
D)rpm

Question 14

The 802.11b standard offers the advantage of speed over the 802.11a and 802.11g standards.

Question 15

Amplification of a signal radiated by an antenna is called ____.

A)gain
B)increase
C)growth
D)generation

Question 16

Up to ____ Bluetooth devices can be connected at the same time.

A)seven
B)ten
C)fifteen
D)twenty

Question 17

Orthogonal Frequency Division Multiplexing (OFDM)functions by dividing the 5 GHz frequency range into a series of ____ subcarriers or subchannels.

A)5
B)15
C)52
D)100

Question 18

In the ____ wireless topology, the broadcast area around a single access point is a cell.

A)IBSS
B)star
C)IAPP
D)multiple-cell

Question 19

Both radio wave and ____ technologies are used for short distance wireless communications within an office, a building, or between buildings.

A)infrared
B)microwave
C)ultraviolet
D)gamma ray

Question 20

The 802.11i standard uses ____ for creating random encryption keys from one master key.

A)AES
B)PSK
C)TKIP
D)RSN

Question 21

How does Direct Sequence Spread Spectrum (DSSS)work?

Question 22

Microwave transmissions have a theoretical bandwidth of up to ____ Mbps.

A)16
B)64
C)128
D)720

Question 23

A(n)____________________ transmission goes from point to point, following the surface of the Earth, rather than bouncing off the atmosphere to skip across the country or continents.

Question 24

The marketed connection speeds through a satellite network are currently up to about ____ for download and upload speeds.

A)1.5 Kbps
B)1.5 Mbps
C)1.5 Gbps
D)1.5 Tbps

Question 25

How does the Inter-Access Point Protocol (IAPP)enable roaming communications?

Question 26

How is the automatic repeat-request (ARQ)characteristic in the 802.11 standard implemented?

Question 27

The ________________________________________ topology consists of ad hoc peer-to-peer communication between WNICs on individual computers.

Question 28

A(n)____________________ is a device that sends out (radiates)and picks up radio waves.

Question 29

WiMAX is another name for the IEEE 802.16 standard for wireless ____.

A)WANs
B)LANs
C)MANs
D)DANs

Question 30

Describe the two operational modes of the current version of high-performance radio local area network (HiperLAN2).

Question 31

A(n)____________________ satellite maintains an orbital position that is stationary with respect to the earth.

Question 32

In ____________________ access, the access point device also functions as a point coordinator.

Question 33

What are five needs that wireless networks are designed and installed to accommodate?

Question 34

An area with public wireless access is called a ____,which is simply a location that provides a public access point to users.

A)hotspot
B)cell
C)nexus
D)hub

Question 35

What is an omnidirectional antenna and how is it used?

Question 36

____ infrared transmits by reflecting the infrared light from the ceiling.

A)Refracted
B)Concentrated
C)Diffused
D)Reflected

Question 37

Describe three options for networking two buildings separated by an interstate highway.

Question 38

Infrared can be broadcast in a single direction or in all directions, using a(n)____ to transmit and a photodiode to receive.

A)antenna
B)LED
C)laser
D)satellite dish

Question 39

Describe the authentication process when using shared key authentication and WEP.

Question 40

Provide a description of terrestrial microwave transmission, including applications in which it might be used.

Question 42

Identify four uses for satellite networks.