Network+ Guide To Networks Chapter 6 - Wireless Networking

Front 1

What wireless standard uses the 2.4 GHz frequency band, has 11 Mbps throughput, and a range of 100 meters?

Back 1

802.11b

Front 2

What wireless standard uses the 5 GHz frequency band, has 54 Mbps throughput, and a range of 20 meters?

Back 2

802.11a

Front 3

What wireless standard uses the 2.4 GHz frequency band, has 54 Mbps throughput, and a range of 100 meters?

Back 3

802.11g

Front 4

What wireless standard uses either 2.4 or 5 GHz frequency band, has 65-600 Mbps throughput, and a range of 400 meters?

Back 4

802.11n

Front 5

What wireless standard uses the 5 GHz frequency band, has 1.3 - 6.93 Gbps throughput?

Back 5

802.11ac

Range is unknown at this time. 802.11ac is being released in three waves. Wave three will have a max theoretical throughput of 6.93 Gpbs. 802.11ac is the first wireless standard to reach speeds like gigabit Ethernet.

Front 6

Issues signals along a single direction.

Back 6

Unidirectional antenna or directional antenna

Front 7

Issues wireless signals in all directions.

Back 7

Omnidirectional antenna

Front 8

When a wave encounters an obstacle and bounces off toward its source.

Back 8

Reflection

Front 9

When a wireless signal splits into secondary waves when it encounters an obstacle is known as what?

Back 9

Diffraction

Front 10

When a wireless signal breaks up into many signals due to encountering an object smaller than its own wavelength is called what? Usually reflects off of a surface in many directions.

Back 10

Scattering

Front 11

The 2.4 GHz band offers how many channels in the united states.

How many over seas?

Back 11

11 in the U.S.

14 over seas

Front 12

In this wireless structure nodes transmit directly to each other via wireless NICs. A wireless LAN where nodes communicate directly with each other.

Back 12

ad hoc WLAN

Front 13

Wireless LAN topology where nodes communicate with an access point and not each other.

Back 13

Infrastructure WLAN

Front 14

Wireless LAN topology where multiple access points work as peer devices providing more fault tolerance.

Back 14

Mesh WLAN

Front 15

A type of hacking attack in which a Bluetooth connection is used to send unsolicited data.

Back 15

Bluejacking

Front 16

A type of hacking attack in which a Bluetooth connection is used to download data without the owner's permission.

Back 16

Bluesnarfing

Front 17

This type of standard does not eliminate the potential for collisions, but minimizes collisions. It does this by checking the channel for for activity and if it does it waits a brief amount of time before checking the channel again.

Back 17

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

Front 18

A situation in which nodes cannot collaborate to prevent collisions is known as what?

A node on one side of the coverage area is too far apart from other nodes of the same coverage area.

Back 18

Hidden Node Problem

Front 19

This protocol ensures packets are not inhibited by other transmissions.

Efficient for large transmission packets.

Decreases overall 802.11 efficiency.

Back 19

RTS/CTS (Request to Send/Clear to Send)

Front 20

A unique character string used to identify an access point.

Back 20

SSID (Service Set Identifier)

Front 21

In ______ scanning a wireless enabled PC listens on all channels with its frequency range for a special signal known as a _______ ________ that is issued by the access point.

Back 21

Passive Scanning; beacon frame

Front 22

In ________ ________ scanning, a computer transmits a special frame known as a ________.

Back 22

Active scanning; probe

Front 23

This type of access point is unauthorized by the network and can be used to steal data or access the network that trusts your system.

Back 23

Rouge Access Point or Evil Twin

Front 24

What is responsible for carrying data between stations in an 802.11 network?

Back 24

Data Frames

Front 25

How many address fields are in a 802.11 data frame?

Back 25

4

Front 26

Issues multiple signals strengths and increases the range of a signal and the data carrying capacity. This technology gives access point the ability to use multiple antennas.

Back 26

MIMO (multiple input-multiple-output)

Front 27

This technology allows access points to use multiple antennas to send multiple signals simultaneously.

Back 27

MU-MIMO (Multiuser MIMO)

Front 28

The combination of two adjacent 20MHz frequency bands to create one 40 MHz frequency band is known as what?

Back 28

Channel Bonding

Front 29

The use of an algorithm to scramble data into a format that can be read only reversing the algorithm is known as what?

Back 29

Encryption

Front 30

A wireless security in which keys are the same in all clients and access points (static keys). This means that there is a "community" key shared by everyone using the same access point.

Back 30

WEP (Wired Equivalent Privacy)

Outdated security method

Front 31

This wireless security method dynamically assigns every transmission its own key.

Back 31

WPA (Wi-Fi Protected Access or Wireless Protected Access)

Front 32

A security threat in which a person drives around searching for unprotected wireless data transmissions.

Back 32

War Driving

Front 33

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

Back 33

BSS (Basic Service Set)

Front 34

What four frequency bands are used in the 5.4 GHz range?

Back 34

5.1 GHz

5.3 GHz

5.4 GHz

5.8 GHz