Final exam: data communications
QQuestions & Answers
At what layer of the OSI model do the 802.11 standards vary?
Show answer choices
Network layer
Data link layer
Physical layer
Transport layer - ANSWERSPhysical layer
What feature of a site survey maps the Wi-Fi signals and other noise in your location?
Show answer choices
Infrared map
Heat map
Ultraviolet map
SSID map - ANSWERSHeat map
Scenario:
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 configure on her AP to meet her requests?
Show answer choices
A guest network
SSID
Password
Basic Service Set - ANSWERSA guest network
Which 802.11 standard functions in both the 2.4-GHz and 5-GHz bands?
Show answer choices
802.11n
802.11b
802.11ac
,802.11g - ANSWERS802.11n
What 802.11 frame type is involved in association and reassociation, including probe
and beacon frames?
Show answer choices
management frames
extended frames
data frames
control frames - ANSWERSmanagement frames
Which Bluetooth class has the highest power output?
Show answer choices
Class 1
Class 2
They all have equal power output
Class 3 - ANSWERSClass 1
What is the lowest layer of the OSI model at which wired and wireless transmissions
share the same protocols?
Show answer choices
Layer 2
Layer 4
Layer 1
Layer 3 - ANSWERSLayer 3
Which one of the following wireless transmission types requires a clear LOS to
function?
Show answer choices
Infrared
NFC
Bluetooth
Wi-Fi - ANSWERSInfrared
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?
Show answer choices
Z-Wave
ANT+
Bluetooth
NFC - ANSWERSNFC
Why do wireless networks experience a greater reduction in throughput compared with
wired networks?
Show answer choices
, Wireless networks experience a Low number of collisions and require greater overhead
on each transmission, resulting in a significant increase in throughput compared to
wired networks.
Wireless networks experience a high number of collisions and require greater overhead
on each transmission, resulting in a significant reduction in throughput compared to
wired networks.
Wireless networks experience a low number of collisions and require greater overhead
on each transmission, resulting in a significant reduction in throughput compared to
wired networks.
wireless networks experience a high number of collisions and require greater overhead
on each transmission, resulting in a significant increase in throughput compared to
wired networks. - ANSWERSWireless networks experience a high number of collisions
and require greater overhead on each transmission, resulting in a significant reduction
in throughput compared to wired networks.
Scenario:
You just settled in for some study time at the local coffee shop
You pause long enough to connect your smartphone 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?
Show answer choices
Brute force attack
Bluejacking
Guest network
Evil twin - ANSWERSEvil twin
Which kind of antenna is used in a point-to-point link, especially over long distances?
Show answer choices
Omni-directional
Software-defined
Fractal
Directional - ANSWERSDirectional
Due to many vulnerabilities and a short key length, the WPA security standard was
replaced with WEP. - ANSWERSF
Healing messages are a feature of what smart home protocol?
Show answer choices
ANT+
Z-Wave
Bluetooth
ZigBee - ANSWERSZ-Wave
QQuestions & Answers
At what layer of the OSI model do the 802.11 standards vary?
Show answer choices
Network layer
Data link layer
Physical layer
Transport layer - ANSWERSPhysical layer
What feature of a site survey maps the Wi-Fi signals and other noise in your location?
Show answer choices
Infrared map
Heat map
Ultraviolet map
SSID map - ANSWERSHeat map
Scenario:
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 configure on her AP to meet her requests?
Show answer choices
A guest network
SSID
Password
Basic Service Set - ANSWERSA guest network
Which 802.11 standard functions in both the 2.4-GHz and 5-GHz bands?
Show answer choices
802.11n
802.11b
802.11ac
,802.11g - ANSWERS802.11n
What 802.11 frame type is involved in association and reassociation, including probe
and beacon frames?
Show answer choices
management frames
extended frames
data frames
control frames - ANSWERSmanagement frames
Which Bluetooth class has the highest power output?
Show answer choices
Class 1
Class 2
They all have equal power output
Class 3 - ANSWERSClass 1
What is the lowest layer of the OSI model at which wired and wireless transmissions
share the same protocols?
Show answer choices
Layer 2
Layer 4
Layer 1
Layer 3 - ANSWERSLayer 3
Which one of the following wireless transmission types requires a clear LOS to
function?
Show answer choices
Infrared
NFC
Bluetooth
Wi-Fi - ANSWERSInfrared
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?
Show answer choices
Z-Wave
ANT+
Bluetooth
NFC - ANSWERSNFC
Why do wireless networks experience a greater reduction in throughput compared with
wired networks?
Show answer choices
, Wireless networks experience a Low number of collisions and require greater overhead
on each transmission, resulting in a significant increase in throughput compared to
wired networks.
Wireless networks experience a high number of collisions and require greater overhead
on each transmission, resulting in a significant reduction in throughput compared to
wired networks.
Wireless networks experience a low number of collisions and require greater overhead
on each transmission, resulting in a significant reduction in throughput compared to
wired networks.
wireless networks experience a high number of collisions and require greater overhead
on each transmission, resulting in a significant increase in throughput compared to
wired networks. - ANSWERSWireless networks experience a high number of collisions
and require greater overhead on each transmission, resulting in a significant reduction
in throughput compared to wired networks.
Scenario:
You just settled in for some study time at the local coffee shop
You pause long enough to connect your smartphone 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?
Show answer choices
Brute force attack
Bluejacking
Guest network
Evil twin - ANSWERSEvil twin
Which kind of antenna is used in a point-to-point link, especially over long distances?
Show answer choices
Omni-directional
Software-defined
Fractal
Directional - ANSWERSDirectional
Due to many vulnerabilities and a short key length, the WPA security standard was
replaced with WEP. - ANSWERSF
Healing messages are a feature of what smart home protocol?
Show answer choices
ANT+
Z-Wave
Bluetooth
ZigBee - ANSWERSZ-Wave
