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1. All wireless signals are carried through the air by electromagnetic waves.
a.
True
b.
False
2. NFC tags are very expensive and cannot be purchased blank, requiring them to be pre-loaded.
a.
True
b.
False
3. The Wi–Fi Protected Setup PIN can be easily cracked through a brute force attack.
a.
True
b.
False
4. Infrared technology utilizes an LED that emits light with shorter wavelengths than red light.
a.
True
b.
False
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5. The most secure Wi–Fi communication is made possible by combining a RADIUS server with WPA or
WPA2, known as WPA-Enterprise or WPA2-Enterprise, respectively.
a.
True
b.
False
6. Due to many vulnerabilities and a short key length, the WPA security standard was replaced with WEP.
a.
True
b.
False
7. The Wireless Personal Area Network (WPAN) is defined in the 802.15 standard.
a.
True
b.
False
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8. Z-Wave transmissions have a range of up to 50m per hop, and can tolerate up to 8 hops through repeaters.
a.
True
b.
False
9. An 802.11 data frame contains four address fields, in contrast to the two address fields in 802.3 Ethernet.
a.
True
b.
False
10. The LLC sublayer is primarily concerned with managing MAC addresses in message frames.
a.
True
b.
False
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11. Diffraction has what affect on a wireless signal’s propagation?
a.
The signal is redirected into multiple directions.
b.
The signal is split into secondary waves that continue in the direction in which they split.
c.
The signal is returned back towards the source of the original signal.
d.
The signal is completely absorbed by the diffracting material.
12. How does refraction affect the propagation of a wireless transmission?
a.
It distorts the signal as it travels into and through a different transmission medium.
b.
It splits the signal into secondary waves that continue in the direction in which they split.
c.
It causes the signal to be returned back towards the source of the origin.
d.
It causes the signal to be absorbed by the refracting material.
13. In Linux, what command can be used for viewing and setting wireless interface parameters?
a.
ifconfig
b.
iwconfig
c.
wlanconf
d.
wifid
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14. 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
15. What special signal is issued periodically from an AP and contains the network transmission rate and
service set identifier (SSID), as well as other information needed for a computer to associate with the AP?
a.
broadcast frame
b.
beacon frame
c.
announcement packet
d.
alert message
16. In IEEE terminology, a group of stations that share an access point are said to be part of which of the
following?
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a.
extended service set
b.
basic service set
c.
modified service set
d.
generic service set
17. 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
18. 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
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19. How does the 802.11 data frame indicate how a large packet should be fragmented?
a.
It uses the preamble header to estimate the ideal packet size.
b.
The frame check sequence dictates the calculated 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.
20. The use of multiple antennas on an access point to issue a signal to one or more receivers is enabled by what
802.11 innovation?
a.
multiple input-multiple output (MIMO)
b.
channel bonding
c.
frame aggregation
d.
spread spectrum frequency hopping
21. 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
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22. 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
23. The wireless spectrum, as defined by the FCC, spans between which two frequencies?
a.
9 kHz and 300 GHz
b.
125 kHz and 150 GHz
c.
3 kHz and 500 GHz
d.
3 MHz and 300 GHz
24. The 802.11 standard specifies the use of what technique in order to minimize the potential for collisions?
a.
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
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b.
Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
c.
Carrier Sense Multiple Access with Collision Mitigation (CMSA/CM)
d.
Carrier Sense Single Access with Collision Adaptation (CSSA/CA)
25. 802.11ac Wave 2 devices can theoretically support how much maximum throughput?
a.
600 Mbps
b.
1.3 Gbps
c.
3.47 Gbps
d.
6.93 Gbps
26. A wireless node that is in active scanning mode transmits what special type of frame in order to find
available access points?
a.
beacon frame
b.
association request
c.
probe frame
d.
ping frame
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27. What type of device can be used to assess the quality of a wireless signal?
a.
Wi–Fi analyzer
b.
spectrum analyzer
c.
channel scanner
d.
frequency hopper
28. What scenario describes an evil twin attack?
a.
A malicious access point is configured with the SSID of a non-malicious public access point.
b.
An attacker is actively attempting to brute force the PIN of a WPS enabled access point.
c.
A hacker is actively sending wireless probes to discover available wireless networks.
d.
A hacker is utilizing a protocol analyzer on a public Wi–Fi network to discover packet contents.
29. Which Bluetooth power class allows for a maximum power output of 100 mW and a range of up to 100 m?
a.
Class 1
b.
Class 2
c.
Class A
d.
Class X
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30. Healing messages are a feature of what smart home protocol?
a.
ZigBee
b.
Bluetooth
c.
Z-Wave
d.
ANT+
31. When using RFID, what is an ARPT (Active Reader Passive Tag)?
a.
It is a battery-powered tag actively transmits its credentials at regular time intervals, which can be
read remotely.
b.
It is a tag that requires an active reader, but still contains a battery in the tag.
c.
It is a tag that is activated by an active reader, and uses power from the reader’s radio to power its
transmission.
d.
It is a tag that can be read remotely up to a distance of 50 m, but requires a powerful active reader.
32. Near-field communication devices send data at what fixed frequency?
a.
8.65 MHz
b.
13.56 MHz
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c.
21.39 MHz
d.
47.1 MHz
33. What is the purpose of the Layer 2 LLC sublayer?
a.
It is used to handle multiplexing, flow and error control, and reliability.
b.
It is used to manage MAC addresses in message frames.
c.
It performs management of the physical layer’s modulation techniques.
d.
It is used to manage low-level encryption on a network.
34. What optional protocol can be used in 802.11 to reserve the medium for one node’s use?
a.
RTS/CTS (Request to Send/Clear to Send)
b.
RAR/CTU (Reserve Airtime Request/Clear to Use)
c.
HA/RA (Hold Airtime/Reserved Airtime)
d.
RT/FT (Request Time/Fair Time)
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35. In an 802.11 data frame, what is the maximum amount of data that can be sent?
a.
1500 bytes
b.
2312 bytes
c.
4582 bytes
d.
9000 bytes
36. Which of the following statements regarding the 802.11ac standard is NOT accurate?
a.
The standard was officially approved in early 2014.
b.
802.11ac access points function more like a hub than a switch.
c.
802.11ac access points can handle multiple transmissions at one time over the same frequency.
d.
802.11ac operates on the 5-GHz band.
37. You are troubleshooting a client’s wireless networking issue. Which of the following will prevent the client
from connecting to the network?
a.
The client has a wireless profile configured for the “campus” SSID, but the access point is
broadcasting the “CAMPUS” SSID.
b.
The client is using an 802.11n wireless adapter, but the access point only supports up to 802.11g.
c.
The client is using a network adapter with outdated firmware.
d.
The client is only able to get line of sight with an omnidirectional antenna.
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38. When troubleshooting wireless issues, what statement is accurate?
a.
A WPA key can be used to associate with a WEP configured access point.
b.
Access points that use overlapping channels can cause interference with each other if they are too
close.
c.
Simultaneous wired and wireless network connections do not affect the ability to communicate on
the network.
d.
Access point power levels should always be configured to output as much power as possible.
39. If you need to evaluate Wi–Fi network availability as well as optimize Wi–Fi signal settings and identify
security threats, what tool should you use?
a.
spectrum analyzer
b.
protocol analyzer
c.
Wi–Fi analyzer
d.
air scanner
40. Upon connecting to a Wi–Fi network, you’re redirected to a login screen and a request to accept terms of
service before being connected. What is this an example of?
a.
guest network profile
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b.
captive portal
c.
WPA2-Enterprise
d.
browser hijacking
41. What are some of the different types of wireless topologies that can be created?
42. Describe the 802.11a standard, and detail some of its history and advantages / disadvantages versus other
802.11 standards.
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43. What is the hidden node problem, and how can it be mitigated?
44. Most wireless devices use one of two technologies to avoid interference. What are these technologies?
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45. Radiation patterns can be used to classify antennas into what two basic categories?
46. Why should an access point not always utilize all the power it has for broadcasting wireless signals?
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47. When deciding antenna types, why might the use of an omnidirectional antenna be inadvisable?
48. What is the difference between war driving and war chalking?
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49. How does configuration of wireless clients for wireless access in an enterprise environment differ from
normal setup?
50. Why should the WPS PIN feature be avoided if possible?