Chapter 6

To exchange information, two antennas must be tuned to the same ________.

Frequency

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

Wi-Fi

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

802.11n

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 transmissions share the same protocols?

Layer 3

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

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?

Rogue access point

Signals traveling through areas in which many wireless communications systems are in use will exhibit a lower ________ because of the high proportion of noise.

Signal-to-noise ratio (SNR)