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Test your basic knowledge |
Wireless Networking Vocab
Start Test
Study First
Subject
:
it-skills
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. In the context of 802.11n wireless networking - the ability for access points to issue multiple signals to stations - thereby multiplying the signal's strength and increasing their range and data-carrying capacity. Because the signals follow multipat
MIMO (Multiple Input-Multiple Output)
FHSS (Frequency Hopping Spread Spectrum)
Omnidirectional Antenna
Association
2. On your Linux workstation - you open a terminal window and type at the command prompt iwconfig eth0 key 5c00951b22. What have you done?
ESS (Extended Service Set Identifier)
Established the credentials the wireless interface will use to communicate securely with the access point
5 GHz Band
DSSS (Direct-Sequence Spread Spectrum)
3. A network access method used on 802.11 wireless networks. In CSMA/CA - before a node begins to send data it checks the medium. If it detects no transmission activity - it waits a brief - random amount of time - and then sends its transmission. If the
Radiation pattern
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
Roaming
Ad Hoc
4. A type of wireless LAN in which stations communicate directly with each other (rather than using an access point)
RTS/CTS (Request to Send/Clear to Send)
Bluetooth Special Interest Group (SIG)
Ad Hoc
Bluetooth
5. In the context of wireless - the phenomenon that occurs when an electromagnetic wave encounters an obstacle and bounces back toward its source. A wireless signal will bounce off objects whose dimensions are large compared to the signal's average wave
Satellite Return
2.4 GHz Band
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
Reflection
6. What frequency band is used by Bluetooth - 802.11b - and 802.11g?
DSSS (Direct-Sequence Spread Spectrum)
canning
802.11 transmission requirement that contributes to its inefficiency
B. 2.4 GHz
7. In _____ - a transmitter concentrates the signal energy at a single frequency or in a very small range of frequencies.
Narrowband
Omnidirectional Antenna
Access Point
iwconfig
8. In the context of 802.11n wireless technology - the combination of two 20-MHz frequency band to create one 40-MHz frequency band that can carry more than twice the amount of data that a single 20-MHz band could. It's recommended for use only in the 5
Narrowband
Downlink
Channel Bonding
2.4 GHz Band
9. The relative strength over a three dimensional area of all the electromagnetic energy an antenna sends or receives.
SSID (Service Set Identifier)
2.4 GHz Band
Radiation pattern
Access Point
10. An exchange in which a wireless station requests the exclusive right to communicate with an access point and the access point confirms that it has granted that request.
Bluetooth Special Interest Group (SIG)
Site Survey
5 GHz Band
RTS/CTS (Request to Send/Clear to Send)
11. A destination node must issue an acknowledgment for every packet that is received intact.
Directional Antenna
802.11 transmission requirement that contributes to its inefficiency
Spread Spectrum
Site Survey
12. The geographical area in which signals issued from an antenna or wireless system can be consistently and accurately received.
2.4 GHz Band
Range
Access Point
Hot Spot
13. A command-line utility for viewing and setting wireless interface parameters on Linux and UNIX workstations.
BSSID (Basic Service Set Identifier)
iwconfig
Ad Hoc
Downlink
14. A special identifier shared by BSSs that belong to the same ESS.
ESSID (Extended Service Set Identifier)
LOS (Line of Sight)
LEO (Low Earth Orbiting)
Fading
15. Regulated radio frequency band - 1/3rd range of 802.11b or g - Usually found in corporate environments.
5 GHz
Roaming
SSID (Service Set Identifier)
Association
16. A type of WLAN in which stations communicate with an access point and not directly with each other.
SSID (Service Set Identifier)
LOS (Line of Sight)
Infrastructure WLAN
Downlink
17. An antenna's _______ _______ describes the relative strength over a three-dimensional area of all the electromagnetic energy the antenna sends or receives.
Radiation Pattern
2.4 GHz Band
B. 2.4 GHz
Satellite Return
18. Omnidirectional
FHSS (Frequency Hopping Spread Spectrum)
GEO (Geosynchronous Orbit or Geostationary Orbit)
Beacon Frame
To transmit and receive signals to and from multiple nodes in a three-storey house - what type of antenna should an access point use?
19. A type of satellite that orbits the Earth with an altitude between 100 and 900 miles - closer to the Earth's poles than the orbits of either GEO or MEO satellites. LEO satellites cover a smaller geographical range than GEO satellites and require less
5 GHz Band
Ad Hoc
LEO (Low Earth Orbiting)
Reassociation
20. An access point that provides routing functions and is used as a gateway.
Wireless Gateway
LOS (Line of Sight)
Mobile Wireless
Range
21. A ______ ______ issues wireless signals along a single direction. This type of antenna is used when the source needs to communicate with one destination - as in a point to point link.
Directional Antenna
To transmit and receive signals to and from multiple nodes in a three-storey house - what type of antenna should an access point use?
RTS/CTS (Request to Send/Clear to Send)
A beacon frame
22. ISM Range - Radio frequency band that may experience home appliance interference - Unregulated radio frequency band.
2.4 GHz
Beacon Frame
MEO (Medium Earth Orbiting)
WLAN
23. The term used to describe the recently released standards for high thoughput - long-distance digital data exchange over wireless connections. WiMAX (IEEE 802.16) is one example of a wireless broadband technology.
B. 2.4 GHz
Wireless Broadband
Mobile Wireless
Satellite Return
24. A change in a wireless signal's strength as a result of some of the electromagnetic energy being scattered - reflected - or diffracted after being issued by the transmitter.
Omnidirectional Antenna
Wireless Gateway
Wireless Spectrum
Fading
25. When a wireless signal splits into secondary waves as it encounters an obstruction. The secondary waves continue to propagate in the direction in which they were split. (bending around an obstacle)
Diffraction
To transmit and receive signals to and from multiple nodes in a three-storey house - what type of antenna should an access point use?
802.11 signals travel farther than Bluetooth signals- 802.11 technologies transmit data at higher throughputs than Bluetooth.
Stations
26. An area covered by a wireless access point that provides visitors with wireless services - including Internet access.
2.4 GHz Band
Hot Spot
Wireless Gateway
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
27. In the context of wireless networking - the communication that occurs between a station and an access point to enable the station to connect to the network via that access point.
2.4 GHz
Scattering
Association
RTS/CTS (Request to Send/Clear to Send)
28. In wireless networking - the process that describes a station moving between BSSs without losing connectivity.
MEO (Medium Earth Orbiting)
2.4 GHz
Infrastructure WLAN
Roaming
29. In ________ wireless - the receiver can be located anywhere within the transmitter's range. This allows the receiver to roam from one place to another while continuing to pick up its signal.
Ad Hoc
Diffraction
Mobile Wireless
ESS (Extended Service Set Identifier)
30. In IEEE terminology - the identifier for a BSS (basic service set)
BSSID (Basic Service Set Identifier)
Roaming
GEO (Geosynchronous Orbit or Geostationary Orbit)
Passive Scanning
31. In the context of wireless networking - a frame issued by an access point to alert other nodes of its existence.
Mobile Wireless
Active Scanning
Beacon Frame
Multipath signals
32. A unique character string used to identify an access point on an 802.11 network.
SSID (Service Set Identifier)
FHSS (Frequency Hopping Spread Spectrum)
Probe
Wireless
33. An access point that provides routing functions.
Multipath signals
PAN (Personal Area Network)
Wireless Router
802.11 signals travel farther than Bluetooth signals- 802.11 technologies transmit data at higher throughputs than Bluetooth.
34. The signals made of electromagnetic energy that travel through the atmosphere.
To transmit and receive signals to and from multiple nodes in a three-storey house - what type of antenna should an access point use?
BSSID (Basic Service Set Identifier)
Wireless Broadband
Wireless
35. A group of access points and associated stations (or basic service sets) connected to the same LAN.
ESS (Extended Service Set Identifier)
Radiation Pattern
Fading
Frame aggregation - Channel bonding
36. A method used by wireless stations to detect the presence of an access point. In _____ _____ - the station issues a probe to each channel in its frequency range and waits for the access point to respond.
Active Scanning
ESSID (Extended Service Set Identifier)
FHSS (Frequency Hopping Spread Spectrum)
802.11 signals travel farther than Bluetooth signals- 802.11 technologies transmit data at higher throughputs than Bluetooth.
37. Which type of satellites is used to provide satellite Internet access?
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
Roaming
Established the credentials the wireless interface will use to communicate securely with the access point
Geosynchronous orbit
38. This is the diffusion - or the reflection in multiple different directions - of a signal. This occurs when a wireless signal encounters an object that has small dimensions compared to the signal's wavelength.
Established the credentials the wireless interface will use to communicate securely with the access point
2.4 GHz Band
Scattering
Bluetooth
39. Which techniques help to reduce overhead in 802.11n wireless transmission?
Stations
FHSS (Frequency Hopping Spread Spectrum)
Hot Spot
Frame aggregation - Channel bonding
40. If your wireless stations are configured to perform passive scanning - what do they need from an access point to initiate association?
Active Scanning
Access Point
LEO (Low Earth Orbiting)
A beacon frame
41. Used by newer types of WLANs. A range of frequencies that comprises four frequency bands: 5.1 - 5.3 - 5.4 - and 5.8GHz. It consists of 24 unlicensed bands - each 20 MHz wide. This band is used by WLANs that follow the 802.11a and 802.11n standards.
canning
Wireless Gateway
In the 802.11 standard - IEEE specifies what type of access method?
5 GHz Band
42. Because of reflection - diffraction - and scattering - wireless signals follow a number of different paths to their destination.
Spread Spectrum
Multipath signals
Fixed Wireless
SSID (Service Set Identifier)
43. The use of multiple frequencies to transmit a signal. (because the signal is spread out over the wireless spectrum)
802.11 signals travel farther than Bluetooth signals- 802.11 technologies transmit data at higher throughputs than Bluetooth.
Spread Spectrum
Mobile Wireless
Ad Hoc
44. In the context of wireless networking - the process of a station establishing a connection (or associating) with a different access point.
Satellite Return
WLAN
Omnidirectional Antenna
Reassociation
45. In the context of wireless networking - the process in which a station listens to several channels within a frequency range for a beacon issued by an access point.
Access Point
FHSS (Frequency Hopping Spread Spectrum)
Passive Scanning
Downlink
46. A. CSMA/CA
GEO (Geosynchronous Orbit or Geostationary Orbit)
Wireless Spectrum
In the 802.11 standard - IEEE specifies what type of access method?
Diffraction
47. This type of propagation uses the least amount of energy and results in the reception of the clearest possible signal.
ESS (Extended Service Set Identifier)
Ad Hoc
Radiation Pattern
LOS (Line of Sight)
48. A continuum of the electromagnetic waves used for data and voice communication. The _______ _______ (as defined by the FCC - which controls its use) spans frequencies between 9KHz and 300 GHz. each type of wireless service can be associated with one
Fading
5 GHz
Wireless Spectrum
Geosynchronous orbit
49. A type of satellite Internet access service in which a subscriber sends and receives data to and from the Internet over the satellite link. This is a symmetrical technology - in which both upstream and downstream throughputs are advertised to reach 4
Probe
Spread Spectrum
5 GHz Band
Satellite Return
50. A connection from an orbiting satellite to an Earth -based receiver.
Mobile Wireless
Access Point
Downlink
Transponder