Chapter 6
To exchange information two antennas must be tuned to the same____ a) Hertz b) Frequency or channel c) Piezo field d) Bi-polar field
Frequency or Channel
What feature of a site survey maps the Wi-Fi signals and other noise in your location?
Heat map
What is the lowest layer of the OSI model at which wired and wireless transmission share the same protocols? a) Layer 4 b) Layer 3 c) Layer 2 d) Layer 1
Layer 3
802.11ac provides an advantage over 802.11n by incorporating increased channel bonding capabilities.What size channels does 802.1ac support?
20, 40, 80, 120
A hacker takes advantage of Bluetooth connection to send a virus to a user's phone. What kind of security breach has occurred? a) Data breach b) Bluejacking c) War driving d) Bluesnarfing
Bluejacking
Which Carrier Sense Technology is used on wireless networks to reduce collisions? a) CSMA/CD b) 802.3 c)802.11 d) CSMA/CA
CSMA/CA
When a wireless signal encounters a large obstacle, what happens to the signal? a) Reflection or bounce back to the source b) Amplifies c) The signal is absorbed and has to be resent
Reflection or bounce back to the source
You've 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? a) Rogue access point b) War driving c) Bluesnarfing d) Hidden node
Rogue access point
Why do wireless network experiences such a great reduction in actual throughput compared with their respective theoretical throughputs?
Wireless networks experience a high number of collisions and require a greater overhead.
Which frequency band offers 24 unlicensed communications channels in the US? a) 5GHz b) 10GHz c) 50GHz d) 20GHz
5GHz band
You just settled in for some study time at the local coffee shop, and you pause long enough to connect your computer to the WiFi so you can listen 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? a) Guest Network b) Bluejacking c) Evil win d) Brute force attack
Evil Twin
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 requests?
Guest networking
Which 802.11 standard can be used in both the 2.4GHz and 5 GHz bands? a) 802.11g b) 802.11n c) 802.11b d) 802.11a
802.11n
An employee has lost his company-provided phone during a bussines trip. What process ensures that he can now perform a remote wipe?
off-boarding
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 a laptop to the other? a) Ad hoc b) Mesh c) Star d) Infrastructure
Ad hoc
Which Bluetooth class has the highest power output? a) Class 1 b) Class 2 c) Class 3 d) Class 4
Class 1
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? a) Bluetooth b) WiMAX c) NFC d) Infrared
NFC
Signals traveling through areas in which many wireless communications systems are in use will exhibit a lower____because of the high proportion of noise. a) SNR(Signal to noise ratio) b) SSR( Signal to signal ratio) c)packet to packet
SNR (Signal to noise ratio)
Which kind of antenna is used in a point-to-point link? a)Unidirectional or directional b)Omnidirectional c) Three-way directional
Unidirectional
Which one of the following wireless trasnmission types NOT require a clear LOS to function? a) Satellite b) Infrared c) Wi-Fi d) WiMax
Wi-Fi
