Chapter 6: Wireless Networking

Bluesnarfing

A hacker takes advantage of a Bluetooth connection to send a virus to a user's phone. What kind of security breach has occurred?

Ad hoc

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 one laptop to the other?

NFC

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?

​The frame check sequence dictates packet size

How does the 802.11 data frame indicate how a large packet should be fragmented?​

4

How many address fields exist in an 802.11 frame?​

4 data streams

How many data streams are used in 802.11ac Wave 2 devices?​

​300 feet

Ideally, stations must remain within what range of an access point in order to maintain optimal transmission speeds?​

basic service set

In IEEE terminology, a group of stations that share an access point are said to be part of what option below?

6 bytes

In an 802.11 data frame, what is the size of the frame check sequence field?​

​5.9 GHz

Select below the band that is not one of the four frequency bands used in the 5 GHz range for wireless LANs:​

​beacon frame

Select below the name for the special signal that contains information that a wireless node requires in order to associate itself with an access point:

​bus

Select below the network topology that is not a valid wireless network topology:​

Layer 3

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

​1.3 Gbps

What is the max theoretical throughput of the 802.11ac wireless technology when using Wave 1 devices?​

​600 Mbps

What is the maximum theoretical throughput of 802.11n?​

​scattering

What signal propagation phenomena causes the diffusion, or the reflection in multiple different directions, of a signal?​

​control frames

Which 802.11 frame type is related to medium access and data delivery, and includes ACK and RTS/CTS frames?​

802.11n

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

​802.11a

Which 802.11 standard was the first to utilize the 5 GHz band?​

​802.11ac

Which 802.11 technology is the first Wi-Fi standard to approach gigabit Ethernet capabilities, and operates on the 5 GHz band?​

​MIMO

Which 802.11 wireless innovation allows for the use of multiple antennas on an access point that can issue a signal to one or more receivers?​

Class 1

Which Bluetooth class has the highest power output?

CSMA/CA

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

​iwconfig

Which command below can be used on Linux to modify the SSID of the access point you choose to associate with?

Wi-Fi

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

Evil twin

You just settled in for some study 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 trap did you almost fall for?

Rogue access point

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?

​Physical layer

​At what layer of the OSI model do the 802.11 standards vary?

​management frames

​What 802.11 frame type is involved in association and reassociation, including probe and beacon frames?

diffraction

​What signal propagation phenomena causes a wireless signal to split into secondary waves when it encounters an obstruction?