Review Questions Net+ Chapter 6 1. What is the lowest layer of the OSI model at which wired and wireless transmissions share the same protocols? Layer 3 is the lowest layer of the OSI model at which wired and wireless transmissions share the same protocols. 2. What technology does Bluetooth use to take advantage of the 79 channels allocated to the Bluetooth band? FHSS is used to take advantage of the 79 channels allocated to the Bluetooth band. 3. Which one of the following wireless transmission types requires a clear LOS to function? NFC requires a clear LOS to function. 4. Which Bluetooth class has the highest power output? Class 1 has the highest power output. 5. A hacker takes advantage of an open Bluetooth connection to send a virus to a user’s smartphone. What kind of security breach has occurred? A Bluesnarfing security breach has occurred. 6. 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? NFC wireless technology transmitted the data. 7. Which 802.11 standard functions in both the 2.4-GHz and 5-GHz bands? 802.11n standard functions in both the 2.4-GHz and 5-GHz bands. 8. Which Carrier Sense technology is used on wireless networks to reduce collisions? CSMA/CA is used on wireless networks to reduce collisions 9. 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? You need to report a Rogue AP threat to your boss. 10. You just settled in for some study time at the local coffee shop, and 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 that you clicked on an SSID called “Free Coffee and Internet.” What kind of security trap did you almost fall for? You almost fell for an Evil twin security trap. 11. To exchange information, two antennas must be tuned to the same frequency or channel. 12. Which kind of antenna is used in a point-to-point link, especially over long distances? A unidirectional antenna is used in a point-to-point link. 13. When a wireless signal encounters a large obstacle, what happens to the signal? It reflects or bounces back to the source. 14. Signals traveling through areas in which many wireless communications systems are in use will exhibit a lower SNR due to the higher proportion of noise. 15. Which Wi-Fi frequency band offers 24 unlicensed communications channels in the United States? A 5GHz band 16. Why do wireless networks experience a greater reduction in throughput compared with wired networks? Wireless networks experience a high number of collisions and require a greater overhead. 17. Which IoT wireless standard is used to sync data from a smartwatch, bike computer, and smart phone to a single user account? An IoT wireless standard that is used to sync data from a smartwatch, bike computer, and smart phone to a single user account 18. 802.11ac provides an advantage over 802.11n by incorporating increased channel bonding capabilities. What size channels does 802.11ac support? 802.11ac supports 20-60 MHz channels, with optional uses of 160 MHz channels. 19. What feature of a site survey maps the Wi-Fi signals and other noise in your location? Heat maps is a feature of a site survey maps the Wi-Fi signals and other noise in your location. 20. 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? A guess network with a captive portal