Deck 6: Wireless Networking

Question 1

NFC tags are very expensive and cannot be purchased blank,requiring them to be pre-loaded.

Answer 1

False

Question 2

What 802.11 frame type is involved in association and reassociation,including probe and beacon frames?

A)management frames
B)control frames
C)data frames
D)extended frames

Answer 2

A

Question 3

The WPS PIN is vulnerable to brute force attacks.

Answer 3

True

Question 4

Which of the following is not a valid wireless network topology?

A)bus
B)infrastructure
C)mesh
D)ad hoc

Question 5

Select below the band that is not one of the four frequency bands used in the 5 GHz range for wireless LANs:

A)5.1 GHz
B)5.3 GHz
C)5.4 GHz
D)5.9 GHz

Question 6

Which command below can be used on Linux to modify the SSID of the access point you choose to associate with?

A)ifconfig
B)iwconfig
C)wlanconfig
D)ipconfig

Question 7

Which 802.11 standard was the first to utilize the 5 GHz band?

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

Question 8

What signal propagation phenomena causes the diffusion,or the reflection in multiple different directions,of a signal?

A)reflection
B)bounce
C)diffraction
D)scattering

Question 9

Ideally,stations must remain within what range of an access point in order to maintain optimal transmission speeds?

A)100 feet
B)200 feet
C)300 feet
D)600 feet

Question 10

What is the maximum theoretical throughput of 802.11n?

A)54 Mbps
B)65 Mbps
C)600 Mbps
D)1.3 Gbps

Question 11

What signal propagation phenomena causes a wireless signal to split into secondary waves when it encounters an obstruction?

A)reflection
B)bounce
C)diffraction
D)scattering

Question 12

Which 802.11 technology is the first Wi-Fi standard to approach gigabit Ethernet capabilities,and operates on the 5 GHz band?

A)802.11a
B)802.11b
C)802.11n
D)802.11ac

Question 13

Which 802.11 frame type is related to medium access and data delivery,and includes ACK and RTS/CTS frames?

A)management frames
B)control frames
C)data frames
D)extended frames

Question 14

How many address fields exist in an 802.11 frame?

A)2
B)3
C)4
D)6

Question 15

In IEEE terminology,a group of stations that share an access point are said to be part of what option below?

A)extended service set
B)basic service set
C)modified service set
D)generic service set

Question 16

What is the name for the special signal that contains information that a wireless node requires in order to associate itself with an access point?

A)broadcast frame
B)hello packet
C)beacon frame
D)announcement message

Question 17

At what layer of the OSI model do the 802.11 standards vary?

A)Physical layer
B)Network layer
C)Data link layer
D)Transport layer

Question 18

All wireless signals are carried through the air by electromagnetic waves.

Question 19

Unlike wired signals,wireless signals originate from electrical current traveling along a capacitor.

Question 20

Multipath signaling is a significant cause of fading.

Question 21

What two terms describe a wireless network topology in which access points work as peer devices on the same network?

A)mesh WLAN
B)infrastructure WLAN
C)wireless gateway
D)wireless mesh network (WMN)

Question 22

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
An 802.11 frame type that is responsible forcarrying data between stations.Two other frame typesinclude management frames,which are involved in associationand reassociation,and control frames,which are relatedto medium access and data delivery.

Question 23

The proportion of noise to the strength of a signal is called the _________________.

Question 24

How many data streams are used in 802.11ac Wave 2 devices?

A)2 data streams
B)3 data streams
C)4 data streams
D)8 data streams

Question 25

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
A security exploit in which a WPS PIN is discoveredby means of a brute force attack,giving the attackeraccess to the network's WPA2 key.The PIN feature in WPSshould be disabled if possible.

Question 26

All 802.11 standards use ______________ signaling,meaning a wireless station can only transmit or receive,but cannot do both simultaneously.

Question 27

At which two layers do wireless LANs operate?

A)Layer 1
B)Layer 2
C)Layer 3
D)Layer 4

Question 28

_________________ is an outdated wireless technology that has been mostly replaced by Bluetooth to connect personal devices.

Question 29

Which of the following are two different types of attacks against Bluetooth connections that can be used to send unsolicited data,or download data without permission?

A)bluesniffing
B)bluejacking
C)bluespoofing
D)bluesnarfing

Question 30

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
The act of driving around an area while runninga laptop configured to detect and capture wireless datatransmissions.

Question 31

How does the 802.11 data frame indicate how a large packet should be fragmented?

A)It uses the preamble header
B)The frame check sequence dictates packet size
C)The sequence control field indicates how packets will be subdivided
D)The duration field determines how long the station can transmit a packet,which then determines how it is divided.

Question 32

The wireless spectrum,as defined by the FCC,spans between which two frequencies?

A)2 KHz
B)9 KHz
C)300 GHz
D)500 GHz

Question 33

What two frequencies are used for most wireless networks?

A)900 MHz
B)2.4 GHz
C)4.9 GHz
D)5 GHz

Question 34

__________________ is a form of radio communication that transfers data wirelessly over very short distances (usually 10 cm or less).

Question 35

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
A method used by wireless stations to detectthe presence of an access point.Using this method,the stationissues a probe to each channel in its frequency range andwaits for the access point to respond.

Question 36

In an 802.11 data frame,what is the size of the frame check sequence field?

A)2 bytes
B)4 bytes
C)6 bytes
D)8 bytes

Question 37

Which 802.11 wireless innovation allows for the use of multiple antennas on an access point that can issue a signal to one or more receivers?

A)MIMO
B)channel bonding
C)frame aggregation
D)radio duplexing

Question 38

What is the max theoretical throughput of the 802.11ac wireless technology when using Wave 1 devices?

A)600 Mbps
B)1.3 Gbps
C)3.47 Gbps
D)6.93 Gbps

Question 39

Access points that include routing functions are also called _______________.

Question 40

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
In the context of wireless signal propagation,thephenomenon that occurs when an electromagnetic waveencounters an obstruction and splits into secondary waves.The secondary waves continue to propagate in the directionin which they were split.

Question 41

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
The use of chalk to draw symbols on a sidewalkor wall within range of an access point.The symbols,patterned after marks that hobos devised to indicate hospitableplaces for food or rest,indicate the access point's SSIDand whether it's secured.

Question 42

Describe the 802.11a standard,and detail some of its history and advantages / disadvantages versus other 802.11 standards.

Question 43

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
The throughput experienced at the applicationlevel,such as the quality of a video feed or the speed of aWeb page loading in the browser.

Question 44

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
A type of antenna that issues wirelesssignals along a single direction,or path.Also called adirectional antenna.

Question 45

Provide information on fading,and describe the different effects that fading can have on wireless transmissions.

Question 46

Explain the difference between a unidirectional antenna and an omnidirectional antenna.

Question 47

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
An attack in which a Bluetooth connection isused to download data from a device without the owner'spermission.

Question 48

Elaborate on the three different types of wireless network topologies.

Question 49

Describe the hidden node problem,and explain how it can be mitigated.

Question 50

Matching
Match each correct item with the statement below.
a.active scanning
b.bluesnarfing
c.data frame
d.diffraction
e.goodput
f.omnidirectional antenna
g.unidirectional antenna
h.war chalking
i.war driving
j.WPS attack
A type of antenna that issues andreceives wireless signals with equal strength and clarity in alldirections.This type of antenna is used when many differentreceivers must be able to pick up the signal,or when thereceiver's location is highly mobile.