CompTIA Network + Guide to Networks 7th Edition N10-007 By Jill West, Tamara Dean, and Jean Andrews Chapter 6 Review Questions and Answers

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 .

Which 802.11 can be used in both the 2.4 GHz and 5 GHz bands ?

Answer : 802.11n

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 are 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

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 : Bluesnarfing

Which Carrier Sense technology is used on wireless networks to reduce collisions ?

Answer : CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)

Which Bluetooth class has the highest power output?

Answer : Class 1

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?

Answer : Create A Guest network , create a captive, portal page , and install DD-WRT on her home router.

You just settled in for some 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 breach did you almost fall for ?

Answer : Evil Twin

What features of a site survey maps the Wi-Fi signals and other noise in your location ?

Answer : Heat map.

A user swipes her smartphone across a tag on a poster to obtain showtimes to a movie that she wants to see later that evening. What wireless technology transmitted the data ?

Answer : NFC (Near-field communication)

What is the lowest layer of the OSI Model at which wired and wireless transmissions share the same protocol ?

Answer : Network layer 3 is the lowest layer of the OSI Model at which wired and wireless transmissions share the same protocol .

An employee has lost his company-provided phone during a business trip . What process ensures that he can now perform a remote swipe ?

Answer : Off-boarding.

You just completed a survey of 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

Which frequency band offers 24 unlicensed , communicating channels in the United States ?

Answer : The 5 GHz Band (Newer)

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 .

Which kind of antenna is used in a point to point link?

Answer : Unidirectional antenna.

Which one of the following wireless transmission types does NOT require a clear LOS to function ?

Answer : Wi-Fi

Why do wireless networks experience such a great reduction in actual throughput compared with their respective , theoretical throughput?

Answer : Wireless networks tend to experience periods of signal degradation during signal propagation . Some technical reasons for degradation include : fading , attenuation , and one of the chiefest reasons for this is noise and the signal-to-noise ratio .

To exchange information , two (2) antennas must be tuned to the same ____________________________________________________.

Answer : frequency

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