Deck 8: Wireless Security

Question 1

WLANA is a consortium of universities researching wireless networking, located at Rutgers University.

Answer 1

False

Question 2

Network signals are transmitted over radio waves in a fashion similar to the way your local radio station broadcasts.

Answer 2

True

Question 3

Priority-based access is intended for communications that are time-sensitive.

Answer 3

True

Question 4

With ARQ, if the station sending a packet does not receive an acknowledgment from the destination station, the sending station automatically retransmits the packet.

Question 5

The IEEE 802.11 standard is also called the IEEE Standard for Wireless LAN Medium Access and Physical Layer Specifications.

Question 6

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

Question 7

ESS enables existing access points to be notified when a new access point is attached to a network, and it enables adjacent access points to share configuration information with one another.

Question 8

An alternative to using radio wave communications is the 802.11R standard for microwave transmissions.

Question 9

Wireless communications only involve two main components: a card that functions as a transmitter/receiver (transceiver), and an access point.

Question 10

All devices that conform to the 802.11a standard must be able to transmit at 6, 12, 24 and 48 Mbps.

Question 11

The PEAP, developed as an alternative to reduce the complexity of authentication, is identical to EAP-TTLS , but does not require the use of certificates.

Question 12

Electronic radiation is propagated through the Earth's atmosphere and through space, with properties that resemble waves and properties that resemble particles.

Question 13

In 802.11 communications, the shared secret is the SSID key used for encryption and decryption, and the key itself is encrypted.

Question 14

The communication method used by 802.11g is OFDM.

Question 15

Most wireless radio wave network equipment employs closed spectrum technology for packet transmissions.

Question 16

In wireless networking, a directional antenna is often used on an indoor network, in which users are mobile and need to broadcast and receive in all directions.

Question 17

The IBSS topology consists of ad hoc peer-to-peer communications between WNICs on individual computers.

Question 18

Many wireless network users are deploying Bluetooth devices because these devices do not rely on proprietary communications, particularly in the lower (and slower) 902-928 MHz range common to older wireless devices.

Question 19

In asynchronous communication, communications occur in discrete units, with the start of a unit signaled by a start bit at the front and a stop bit at the back end.

Question 20

The purpose of a(n) terminal node controller is to convert the computer's digital signal to an analog signal that can be amplified by the transmitter/receiver and broadcast out through an antenna.

Question 21

Which wireless standard uses OFDM?

A) 802.11a
B) 802.11g
C) 802.11b
D) Both a and b
E) Both b and c

Question 22

Which organization is supported by wireless network device manufacturers and promoters, including Alvarion, Cisco Systems, ELAN, Intermec, Intersil, Raylink, and Wireless Central?

A) WINLAB
B) WLANA
C) IEEE
D) WNDMO

Question 23

How many channels does the 802.11b standard use in France?

A) 4
B) 6
C) 11
D) 13

Question 24

Which access method is incorporated into the 802.11 standard?

A) Priority-based
B) CSMA/CA
C) CSMA/CD
D) Both a and b
E) Both a and c

Question 25

On which layers of the OSI model does 802.11 focus?

A) Physical and data-link
B) Data-link and network
C) Physical only
D) Data-link only

Question 26

Which radio frequency band is primarily used in older, nonstandardized wireless devices?

A) 902 MHz
B) 2.4 GHz
C) 5 GHz
D) 11 GHz

Question 27

Which specification enables multiple protocols to be carried over a network, and allows the computer and the computer's operating system to interface with the WNIC?

A) NDIS
B) ODI
C) RPC
D) Both a and b
E) Both b and c

Question 28

When was the first 802.11 standard created?

A) 1985
B) 1987
C) 1995
D) 1997

Question 29

The _____ certification means the device meets the standard for Wi-Fi.

A) WICA
B) WLANA
C) WECA
D) ISO

Question 30

Which of the following can interfere with wireless network communications?

A) Solar flares
B) Physical obstacles
C) Weather
D) All of the above

Question 31

What is the typical data rate of spread spectrum packet transmission?

A) 1-11 Mbps
B) 1-22 Mbps
C) 1-100 Mbps
D) 1-54 Mbps

Question 32

What are the lowest frequencies on which amateur radio operators can transmit?

A) 20.1 to 24.0 MHz
B) 30.1 to 34.0 MHz
C) 40.1 to 44.0 MHz
D) 50.1 to 54.0 MHz

Question 33

What is the name of the device that attaches to a cabled network and services wireless communications between WNICs and the cabled network?

A) Access hub
B) Access switch
C) Access point
D) Wireless router

Question 34

By 2006, how many wireless devices are expected to be installed?

A) Over 50 million
B) Over 75 million
C) Over 90 million
D) Over 100 million

Question 35

Which wireless standard uses DSSS?

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

Question 36

Which organization recognizes amateur radio as a significant avenue for advancing communications through experimentation and invention?

A) FDA
B) OSI
C) EIA/TIA
D) FCC

Question 37

How many channels does the 802.11b standard use in the United States and Canada?

A) 4
B) 11
C) 13
D) 15

Question 38

Radio frequencies are the range of frequencies above _____ kilohertz through which an electromagnetic signal can be radiated into space.

A) 2
B) 5
C) 10
D) 20

Question 39

What is the mail unit of measurement for radio frequencies?

A) Rads
B) Hertz
C) Ohms
D) Watts

Question 40

At what speed must all devices that conform to the 802.11a standard be able to transmit?

A) 6 Mbps
B) 12Mbps
C) 24Mbps
D) All of the above

Question 41

Which wireless standard should be used when there are many individual users in a small area, such as in a computer lab?

A) 802.11a
B) 802.11g
C) 802.11b
D) Both a and c
E) Both a and b

Question 42

What type of device does an attacker use to determine the location of a target wireless network?

A) Antenna
B) GPS
C) WNIC
D) War-driving software

Question 43

In which frequency range does 802.11R operate?

A) 1 Ghz to 2 Ghz
B) 2 Ghz to 5 Ghz
C) 100 Ghz to 1000 Ghz
D) 100 Ghz to 1000 Thz

Question 44

Which wireless roaming protocol generally conforms to the 802.11 standard?

A) ESS
B) IAPP
C) IBSS
D) IWAP

Question 45

What is the distance that most Bluetooth devices can transmit?

A) 30 feet
B) 60 feet
C) 100 feet
D) 300 feet

Question 46

Are network signals transmitted over radio waves in a fashion similar to the way your local radio station broadcasts?

Question 47

What type of wireless network topology is being displayed in the figure above?

A) ESS
B) IBSS
C) 802.11R
D) SOS

Question 48

Does Mac OS X and Apples iMac, iBook, Powerbook G4, and Power Mac G4 computers come with built-in compatibility for 3COM WNICs and base stations (access points)?

Question 49

What type of antenna is being used in the figure above?

A) Directional
B) Omnidirectional
C) Unidirectional
D) Bidirectional

Question 50

Which wireless network topology uses access points to provide a more extensive area of service?

A) BSS
B) ESS
C) IBSS
D) SES

Question 51

What type of antenna is being used in the figure above?

A) Directional
B) Omnidirectional
C) Unidirectional
D) Bidirectional

Question 52

Which is the most expensive wireless standard to implement?

A) 802.11b
B) 802.11g
C) 802.11a
D) They are all about the same

Question 53

Does the 802.11 standard focus on use of the physical and data-link layers (layers 1 and 2) of the OSI model?

Question 54

Is an access point usually a router or switch?

Question 55

What is the width of each channel in the 802.11b standard?

A) 2.4 Ghz
B) 5 Ghz
C) 22 Mhz
D) 11 Mhz

Question 56

What is the name of a wireless topology that uses two or more access points?

A) Multiple-cell wireless LAN
B) Multi access point LAN
C) Multiple-cell wireless WAN
D) Multi access point WAN

Question 57

Does Red Hat Linux 9.x support Bluetooth and offer the Bluetooth Setup Assistant, the Bluetooth Serial Utility, and the Bluetooth File Exchange tools?

Question 58

What is the maximum speed of transmission for directional 802.11R?

A) 1 Mbps
B) 16 Mbps
C) 22 Mbps
D) 56 Mbps

Question 59

What is the maximum operating speed of the 802.11b standard?

A) 11 Mbps
B) 22 Mbps
C) 56 Mbps
D) 54 Mbps

Question 60

What is the maximum distance that 802.11a devices can transmit?

A) 60 feet
B) 100 feet
C) 300 feet
D) 300 meters

Question 61

802.11a uses _____________________________________________ which functions by dividing the 5-GHz frequency range into a series of 52 subcarriers or subchannels.

Question 62

____________________ are licensed by the FCC to transmit voice, Morse code, data, satellite, and video signals over radio waves and microwaves.

Question 63

A limitation of ____________________ transmissions is that they are interrupted by tall land masses, such as hills and mountains.

Question 64

Does the signal gain in an indoor network generally need to be as high as for an outdoor network?

Question 65

Is priority-based access also called the distributed coordination function?

Question 66

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

Question 67

In CSMA/CA, a station waiting to transmit determines if the frequency is idle by checking the ___________________________________ level.

Question 68

____________________ software determines the location of a network, but it can also determine whether the network is an IBBS or ESS topology.

Question 69

____________________ transmissions can be broadcast in a single direction or in all directions, using a LED to transmit and a photodiode to receive.

Question 70

In CSMA/CA, is the backoff time determined by multiplying a predetermined slot-time by a random number?

Question 71

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

Question 72

Does a directional antenna send radio waves in one main direction and generally amplify the radiated signal to a greater degree than an omnidirectional antenna?

Question 73

List five needs are wireless networks are designed and installed to accommodate? (List five.)

Question 74

List the four transmission speeds available when using the 802.11b standard?

Question 75

What two things can an attacker do after successfully launching a man-in-the-middle attack?

Question 76

What four main elements can an attacker use to locate a wireless network?

Question 77

Does the 802.11a wireless transmission standard operate in the 5-GHz range?

Question 78

Because a(n) ____________________ antenna radiates primarily in one direction, the signal goes farther from the source.

Question 79

The 802.11b standard uses _____________________________________________, which is a method for radiating a data-carrying signal over radio waves.

Question 80

What two approaches should be considered when planning for wireless communications?