Chapter 6 Flashcards Preview

Networking+ > Chapter 6 > Flashcards

Flashcards in Chapter 6 Deck (40)
Loading flashcards...
1

All wireless signals are carried through the air by electromagnetic waves.
True
False

True

2

NFC tags are very expensive and cannot be purchased blank, requiring them to be pre-loaded.
True
False

False

3

The Wi-Fi Protected Setup PIN can be easily cracked through a brute force attack.
True
False

True

4

Infrared technology utilizes an LED that emits light with shorter wavelengths than red light.
False
True

False

5

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.
True
False

True

6

Due to many vulnerabilities and a short key length, the WPA security standard was replaced with WEP.
True
False

False

7

The Wireless Personal Area Network (WPAN) is defined in the 802.15 standard.
False
True

True

8

Z-Wave transmissions have a range of up to 50m per hop, and can tolerate up to 8 hops through repeaters.
True
False

False

9

An 802.11 data frame contains four address fields, in contrast to the two address fields in 802.3 Ethernet.
False
True

True

10

The LLC sublayer is primarily concerned with managing MAC addresses in message frames.
True
False

False

11

Diffraction has what affect on a wireless signal's propagation?
The signal is returned back towards the source of the original signal.
The signal is completely absorbed by the diffracting material.
The signal is redirected into multiple directions.
The signal is split into secondary waves that continue in the direction in which they split.

The signal is split into secondary waves that continue in the direction in which they split.

12

How does refraction affect the propagation of a wireless transmission?
It causes the signal to be absorbed by the refracting material.
It splits the signal into secondary waves that continue in the direction in which they split.
It distorts the signal as it travels into and through a different transmission medium.
It causes the signal to be returned back towards the source of the origin.

It distorts the signal as it travels into and through a different transmission medium.

13

In Linux, what command can be used for viewing and setting wireless interface parameters?
wlanconf
iwconfig
wifid
ifconfig

iwconfig

14

At what layer of the OSI model do the 802.11 standards vary?
Physical layer
Network layer
Transport layer
Data link layer

Physical layer

15

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?
beacon frame
alert message
broadcast frame
announcement packet

beacon frame

16

In IEEE terminology, a group of stations that share an access point are said to be part of which of the following?
extended service set
generic service set
modified service set
basic service set

basic service set

17

What 802.11 frame type is involved in association and reassociation, including probe and beacon frames?
extended frames
control frames
data frames
management frames

management frames

18

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

control frames

19

How does the 802.11 data frame indicate how a large packet should be fragmented?
The duration field determines how long the station can transmit a packet, which then determines how it is divided.
It uses the preamble header to estimate the ideal packet size.
The sequence control field indicates how packets will be subdivided.
The frame check sequence dictates the calculated packet size.

The sequence control field indicates how packets will be subdivided.

20

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?
frame aggregation
multiple input-multiple output (MIMO)
channel bonding
spread spectrum frequency hopping

multiple input-multiple output (MIMO)

21

In an 802.11 data frame, what is the size of the frame check sequence field?
8 bytes
6 bytes
4 bytes
2 bytes

6 bytes

22

How many data streams are used in 802.11ac Wave 2 devices?
2 data streams
8 data streams
4 data streams
3 data streams

4 data streams

23

The wireless spectrum, as defined by the FCC, spans between which two frequencies?
3 MHz and 300 GHz
9 kHz and 300 GHz
125 kHz and 150 GHz
3 kHz and 500 GHz

9 kHz and 300 GHz

24

The 802.11 standard specifies the use of what technique in order to minimize the potential for collisions?
Carrier Sense Single Access with Collision Adaptation (CSSA/CA)
Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
Carrier Sense Multiple Access with Collision Mitigation (CMSA/CM)

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

25

802.11ac Wave 2 devices can theoretically support how much maximum throughput?
6.93 Gbps
600 Mbps
1.3 Gbps
3.47 Gbps

3.47 Gbps

26

A wireless node that is in active scanning mode transmits what special type of frame in order to find available access points?
probe frame
ping frame
beacon frame
association request

probe frame

27

What type of device can be used to assess the quality of a wireless signal?
frequency hopper
channel scanner
spectrum analyzer
Wi-Fi analyzer

spectrum analyzer

28

What scenario describes an evil twin attack?
An attacker is actively attempting to brute force the PIN of a WPS enabled access point.
A hacker is actively sending wireless probes to discover available wireless networks.
A malicious access point is configured with the SSID of a non-malicious public access point.
A hacker is utilizing a protocol analyzer on a public Wi-Fi network to discover packet contents.

A malicious access point is configured with the SSID of a non-malicious public access point.

29

Which Bluetooth power class allows for a maximum power output of 100 mW and a range of up to 100 m?
Class 1
Class X
Class A
Class 2

Class 1

30

Healing messages are a feature of what smart home protocol?
ZigBee
ANT+
Bluetooth
Z-Wave

Z-Wave