Network + Ch 6 RQ

11 September 2022
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18 test answers

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question
What is the lowest layer of the OSI model at which wired and wireless transmissions share the same protocols?
answer
Layer 3
question
Which one of the following wireless transmission types does NOT require a clear LOS to function
answer
WI-FI
question
Which Bluetooth class has the highest power output?
answer
class 1
question
A hacker takes advantage of a Bluetooth connection to send a virus to a user's phone. What kind of security breach has occurred?
answer
Blue-snarfing
question
A user swipes her smartphone across a tag on a poster to obtain showtimes for a movie she wants to see later that evening. What wireless technology transmitted the data?
answer
NFC (near-field communication)
question
A student has completed his part of a group research paper, and needs to share it with a classmate. He sees the classmate as they're crossing the parking lot between classes. Which WLAN architecture could they use to transfer the file from one laptop to the other?
answer
ad hoc WLAN
question
Which 802.11 standard can be used in both the 2.4-GHz and 5-GHz bands?
answer
802.11n
question
Which Carrier Sense technology is used on wireless networks to reduce collisions?
answer
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
question
You've just completed a survey of the wireless signals traversing the airspace in your employer's vicinity, and you've found an unauthorized AP with a very strong signal near the middle of the 100-acre campus. What kind of threat do you need to report to your boss?
answer
Rogue access point
question
Your just settled in for some study time at the local coffee shop, and you pause long enough to connect your computer to the Wi-Fi so you can listen to some music while you study. As you're about to sign in, you realize you clicked on an SSID called "Free Coffee and Internet." what kind of security trap did you almost fall for?
answer
Evil twin
question
To exchange information, two antennas must be tuned to the same_________.
answer
Frequency
question
Which kind of antenna is used in a point to point link?
answer
Unidirectional antenna
question
When a wireless signal encounters a large obstacle, what happens to the signal?
answer
The signal may pass through the object or be absorbed by the object, or it may be subject to the following phenomena: reflection, diffraction, or scattering.
question
Signals traveling through areas in which many wireless communications systems are in use will exhibit a lower___________ because of the high proportion of noise.
answer
throughput because Signal to noise ratio (SNR or S/N).
question
802.11ac provides an advantage over 802.11n by incorporating increased channel bonding capabilities. What size channels does 802.11ac support?
answer
20, 40, 80, 160-MHz channels
question
What feature of a site survey maps the Wi-Fi signals and other noise in your location?
answer
Heat map and dead zones
question
An employee has lost his company-provided phone during a business trip. What process ensures that he can now perform a remote a remote wipe?
answer
Off-boarding
question
You're setting up a home network for your neighbor, who is a music teacher. She has students visiting her home regularly for lessons and wants to provide internet access for their parents while they're waiting on the children. However, she's concerned about keeping her own data private. What wireless feature can you set up on her AP to meet her request?
answer
Make a guest network, while also making a captive portal page, while also installing DD-WRT on her home router