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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 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
Channel Bonding
Stations
Downlink
Directional Antenna
2. A type of wireless LAN in which stations communicate directly with each other (rather than using an access point)
B. 2.4 GHz
Probe
Ad Hoc
Bluetooth Special Interest Group (SIG)
3. 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.
ESSID (Extended Service Set Identifier)
Downlink
Active Scanning
In the 802.11 standard - IEEE specifies what type of access method?
4. In _____ - a transmitter concentrates the signal energy at a single frequency or in a very small range of frequencies.
Narrowband
Scattering
Geosynchronous orbit
Infrastructure WLAN
5. An ______ ______ issues and receives wireless signals with equal strength and clarity in all directions. This type of antenna is used when many different receivers must be able to pick up the signal - or when the receiver's location is highly mobile.
Fixed Wireless
Spread Spectrum
Omnidirectional Antenna
2.4 GHz Band
6. 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.
Reassociation
Radiation pattern
LEO (Low Earth Orbiting)
Mobile Wireless
7. 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
Active Scanning
Wireless Router
Radiation Pattern
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
8. An access point that provides routing functions and is used as a gateway.
Access Point
In the 802.11 standard - IEEE specifies what type of access method?
Fading
Wireless Gateway
9. 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
Reassociation
RTS/CTS (Request to Send/Clear to Send)
Dial Return
Reflection
10. A small (usually home) network composed of personal communications devices.
Hot Spot
PAN (Personal Area Network)
DSSS (Direct-Sequence Spread Spectrum)
802.11 transmission requirement that contributes to its inefficiency
11. 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
Radiation Pattern
Directional Antenna
Wireless
12. 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.
Passive Scanning
Spread Spectrum
Bluetooth
Infrastructure WLAN
13. 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)
Narrowband
iwconfig
Range
14. Which techniques help to reduce overhead in 802.11n wireless transmission?
RTS/CTS (Request to Send/Clear to Send)
Frame aggregation - Channel bonding
Satellite Return
5 GHz
15. The signals made of electromagnetic energy that travel through the atmosphere.
Omnidirectional Antenna
Wireless
ESSID (Extended Service Set Identifier)
Hot Spot
16. In ________________ - a signal jumps between several different frequencies within a band in a synchronization pattern known only to the channel's receiver and transmitter.
Passive Scanning
PAN (Personal Area Network)
FHSS (Frequency Hopping Spread Spectrum)
Scattering
17. In IEEE terminology - the identifier for a BSS (basic service set)
BSSID (Basic Service Set Identifier)
Site Survey
GEO (Geosynchronous Orbit or Geostationary Orbit)
WLAN
18. The relative strength over a three dimensional area of all the electromagnetic energy an antenna sends or receives.
Reflection
Reassociation
Radiation pattern
PAN (Personal Area Network)
19. The use of multiple frequencies to transmit a signal. (because the signal is spread out over the wireless spectrum)
MIMO (Multiple Input-Multiple Output)
Spread Spectrum
In the 802.11 standard - IEEE specifies what type of access method?
iwconfig
20. A destination node must issue an acknowledgment for every packet that is received intact.
802.11 transmission requirement that contributes to its inefficiency
MIMO (Multiple Input-Multiple Output)
Wireless
Narrowband
21. A connection from an orbiting satellite to an Earth -based receiver.
Satellite Return
Wireless Broadband
Downlink
B. 2.4 GHz
22. On your Linux workstation - you open a terminal window and type at the command prompt iwconfig eth0 key 5c00951b22. What have you done?
Scattering
Channel Bonding
Wireless Router
Established the credentials the wireless interface will use to communicate securely with the access point
23. Because of reflection - diffraction - and scattering - wireless signals follow a number of different paths to their destination.
Radiation Pattern
RTS/CTS (Request to Send/Clear to Send)
Multipath signals
Downlink
24. A group of access points and associated stations (or basic service sets) connected to the same LAN.
ESS (Extended Service Set Identifier)
FHSS (Frequency Hopping Spread Spectrum)
Wireless Gateway
Bluetooth Special Interest Group (SIG)
25. 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
Reassociation
Wireless Spectrum
WLAN
PAN (Personal Area Network)
26. 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.
SSID (Service Set Identifier)
Association
Scattering
Multipath signals
27. A. CSMA/CA
Probe
In the 802.11 standard - IEEE specifies what type of access method?
Radiation Pattern
MEO (Medium Earth Orbiting)
28. Regulated radio frequency band - 1/3rd range of 802.11b or g - Usually found in corporate environments.
Wireless Gateway
5 GHz
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
Fading
29. Networks that transmit signals through the atmosphere via radio frequency (RF) waves.
WLAN
Spread Spectrum
Mobile Wireless
Hot Spot
30. The equipment on a satellite that receives an uplinked signal from Earth - amplifies the signal - modifies its frequency - then retransmits it (in a downlink) to an antenna on Earth.
Reflection
Multipath signals
Transponder
Association
31. Another type of Spread-Spectrum signaling. In __________ - a signal's bits are distributed over an entire frequency band at once. Each bit is coded so that the receiver can reassemble the original signal upon receiving the bits.
Range
Reassociation
DSSS (Direct-Sequence Spread Spectrum)
Wireless Spectrum
32. The range of radio frequencies from 2.4 to 2.4835 GHz. This band allows for 11 unlicensed channels - and is used by WLANs that follow the popular 802.11b and 802.11g standards.
Diffraction
Channel Bonding
WLAN
2.4 GHz Band
33. 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
Satellite Return
Range
To transmit and receive signals to and from multiple nodes in a three-storey house - what type of antenna should an access point use?
In the 802.11 standard - IEEE specifies what type of access method?
34. Omnidirectional
802.11 transmission requirement that contributes to its inefficiency
To transmit and receive signals to and from multiple nodes in a three-storey house - what type of antenna should an access point use?
Beacon Frame
Wireless Spectrum
35. The locations of the transmitter and receiver do not move. The transmitting antenna focuses its energy directly toward the receiving antenna. This results in a point to point link. (Advantage: receiver's location is predictable - energy need not be w
Directional Antenna
Fixed Wireless
Range
802.11 transmission requirement that contributes to its inefficiency
36. An antenna's _______ _______ describes the relative strength over a three-dimensional area of all the electromagnetic energy the antenna sends or receives.
iwconfig
PAN (Personal Area Network)
Active Scanning
Radiation Pattern
37. What frequency band is used by Bluetooth - 802.11b - and 802.11g?
Fading
ESSID (Extended Service Set Identifier)
Hot Spot
B. 2.4 GHz
38. 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.
Fixed Wireless
SSID (Service Set Identifier)
Directional Antenna
Range
39. In the context of wireless networking - the process of a station establishing a connection (or associating) with a different access point.
LEO (Low Earth Orbiting)
Infrastructure WLAN
To transmit and receive signals to and from multiple nodes in a three-storey house - what type of antenna should an access point use?
Reassociation
40. In the context of wireless networking - a frame issued by an access point to alert other nodes of its existence.
Multipath signals
Spread Spectrum
Beacon Frame
Bluetooth
41. In 802.11 wireless networking - a type of frame issued by a station during active scanning to find nearby access points.
Infrastructure WLAN
Probe
WLAN
RTS/CTS (Request to Send/Clear to Send)
42. 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.
FHSS (Frequency Hopping Spread Spectrum)
Scattering
Reassociation
Directional Antenna
43. If your wireless stations are configured to perform passive scanning - what do they need from an access point to initiate association?
Active Scanning
RTS/CTS (Request to Send/Clear to Send)
A beacon frame
LEO (Low Earth Orbiting)
44. Why are the 802.11b and 802.11g wireless transmission technologies more commonly used on business LANs than Bluetooth?
Wireless Spectrum
Geosynchronous orbit
802.11 signals travel farther than Bluetooth signals- 802.11 technologies transmit data at higher throughputs than Bluetooth.
BSSID (Basic Service Set Identifier)
45. The process a wireless station undergoes to find an access point.
LOS (Line of Sight)
2.4 GHz
Roaming
canning
46. A device used on wireless LANs that transmits and receives wireless signals to and from multiple nodes and retransmits them to the rest of the network segment. Access points can connect a group of nodes with a network or two networks with each other.
Spread Spectrum
Narrowband
Access Point
Ad Hoc
47. A type of satellite that orbits the Earth roughly 6000 to 12 -000 miles above its service - positioned between the equator and the poles. MEO satellites can cover a larger area of the Earth's surface than LEO satellites while using less power and cau
DSSS (Direct-Sequence Spread Spectrum)
MEO (Medium Earth Orbiting)
5 GHz Band
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
48. The geographical area in which signals issued from an antenna or wireless system can be consistently and accurately received.
Reassociation
Range
Association
Dial Return
49. A type of WLAN in which stations communicate with an access point and not directly with each other.
Stations
5 GHz Band
Association
Infrastructure WLAN
50. 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.
2.4 GHz
Dial Return
Probe
5 GHz Band