networking chapter 6
3.47 Gbps
802.11ac Wave 2 devices can theoretically support how much maximum throughput?
Z-Wave
Healing messages are a feature of what smart home protocol?
It distorts the signal as it travels into and through a different transmission medium.
How does refraction affect the propagation of a wireless transmission?
9 kHz and 300 GHz
The wireless spectrum, as defined by the FCC, spans between which two frequencies?
The client has a wireless profile configured for the "campus" SSID, but the access point is broadcasting the "CAMPUS" SSID.
You are troubleshooting a client's wireless networking issue. Which of the following will prevent the client from connecting to the network?
probe frame
A wireless node that is in active scanning mode transmits what special type of frame in order to find available access points?
True
All wireless signals are carried through the air by electromagnetic waves.
True
An 802.11 data frame contains four address fields, in contrast to the two address fields in 802.3 Ethernet.
Physical layer
At what layer of the OSI model do the 802.11 standards vary?
The signal is split into secondary waves that continue in the direction in which they split.
Diffraction has what affect on a wireless signal's propagation?
False
Due to many vulnerabilities and a short key length, the WPA security standard was replaced with WEP.
The sequence control field indicates how packets will be subdivided.
How does the 802.11 data frame indicate how a large packet should be fragmented?
4 data streams
How many data streams are used in 802.11ac Wave 2 devices?
Wi-Fi analyzer
If you need to evaluate Wi-Fi network availability as well as optimize Wi-Fi signal settings and identify security threats, what tool should you use?
basic service set
In IEEE terminology, a group of stations that share an access point are said to be part of which of the following?
iwconfig
In Linux, what command can be used for viewing and setting wireless interface parameters?
2312 bytes
In an 802.11 data frame, what is the maximum amount of data that can be sent?
6 bytes
In an 802.11 data frame, what is the size of the frame check sequence field?
False
Infrared technology utilizes an LED that emits light with shorter wavelengths than red light.
Multiple Input Multiple Output (MIMO)
The use of multiple antennas on an access point to issue a signal to one or more receivers is enabled by what 802.11 innovation?
False
NFC tags are very expensive and cannot be purchased blank, requiring them to be pre-loaded.
13.56 MHz
Near-field communication devices send data at what fixed frequency?
802.11ac access points function more like a hub than a switch.
Which of the following statements regarding the 802.11ac standard is NOT accurate?
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
The 802.11 standard specifies the use of what technique in order to minimize the potential for collisions?
False
The LLC sublayer is primarily concerned with managing MAC addresses in message frames.
True
The Wi-Fi Protected Setup PIN can be easily cracked through a brute force attack.
True
The Wireless Personal Area Network (WPAN) is defined in the 802.15 standard.
True
The most secure Wi-Fi communication is made possible by combining a RADIUS server with WPA or WPA2, known as WPA-Enterprise or WPA2-Enterprise, respectively.
captive portal
Upon connecting to a Wi-Fi network, you're redirected to a login screen and a request to accept terms of service before being connected. What is this an example of?
management frames
What 802.11 frame type is involved in association and reassociation, including probe and beacon frames?
It is used to handle multiplexing, flow and error control, and reliability.
What is the purpose of the Layer 2 LLC sublayer?
A malicious access point is configured with the SSID of a non-malicious public access point.
What scenario describes an evil twin attack?
beacon frame
What special signal is issued periodically from an AP and contains the network transmission rate and service set identifier (SSID), as well as other information needed for a computer to associate with the AP?
spectrum analyzer
What type of device can be used to assess the quality of a wireless signal?
Access points that use overlapping channels can cause interference with each other if they are too close.
When troubleshooting wireless issues, what statement is accurate?
It is a tag that is activated by an active reader, and uses power from the reader's radio to power its transmission.
When using RFID, what is an ARPT (Active Reader Passive Tag)?
control frames
Which 802.11 frame type is related to medium access and data delivery, and includes ACK and RTS/CTS frames?
Class 1
Which Bluetooth power class allows for a maximum power output of 100 mW and a range of up to 100 m?
False
Z-Wave transmissions have a range of up to 50m per hop, and can tolerate up to 8 hops through repeaters.
