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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. Because of reflection - diffraction - and scattering - wireless signals follow a number of different paths to their destination.
Channel Bonding
Access Point
Multipath signals
ESS (Extended Service Set Identifier)
2. 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
Ad Hoc
ESSID (Extended Service Set Identifier)
Fixed Wireless
Transponder
3. A command-line utility for viewing and setting wireless interface parameters on Linux and UNIX workstations.
iwconfig
Geosynchronous orbit
Dial Return
Reflection
4. 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)
5 GHz
Probe
ESS (Extended Service Set Identifier)
5. The use of multiple frequencies to transmit a signal. (because the signal is spread out over the wireless spectrum)
Spread Spectrum
2.4 GHz
Active Scanning
Beacon Frame
6. In the context of wireless networking - an assessment of client requirements - facility characteristics - and coverage areas to determine an access point arrangement that will ensure reliable wireless connectivity within a given area.
Site Survey
Satellite Return
Multipath signals
Probe
7. 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
Downlink
MIMO (Multiple Input-Multiple Output)
Narrowband
MEO (Medium Earth Orbiting)
8. 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
ESS (Extended Service Set Identifier)
Radiation pattern
Channel Bonding
9. The signals made of electromagnetic energy that travel through the atmosphere.
Ad Hoc
Wireless
Site Survey
FHSS (Frequency Hopping Spread Spectrum)
10. 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.
FHSS (Frequency Hopping Spread Spectrum)
Active Scanning
DSSS (Direct-Sequence Spread Spectrum)
Wireless Spectrum
11. In _____ - a transmitter concentrates the signal energy at a single frequency or in a very small range of frequencies.
Narrowband
Dial Return
Directional Antenna
Radiation Pattern
12. A type of WLAN in which stations communicate with an access point and not directly with each other.
Beacon Frame
Infrastructure WLAN
Reassociation
DSSS (Direct-Sequence Spread Spectrum)
13. In the context of wireless networking - a frame issued by an access point to alert other nodes of its existence.
GEO (Geosynchronous Orbit or Geostationary Orbit)
Beacon Frame
5 GHz Band
Stations
14. 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
Site Survey
SSID (Service Set Identifier)
ESSID (Extended Service Set Identifier)
Reflection
15. On your Linux workstation - you open a terminal window and type at the command prompt iwconfig eth0 key 5c00951b22. What have you done?
Hot Spot
Wireless
Established the credentials the wireless interface will use to communicate securely with the access point
iwconfig
16. An access point that provides routing functions and is used as a gateway.
802.11 signals travel farther than Bluetooth signals- 802.11 technologies transmit data at higher throughputs than Bluetooth.
Wireless Gateway
Fading
Wireless Router
17. A connection from an orbiting satellite to an Earth -based receiver.
Bluetooth Special Interest Group (SIG)
Narrowband
Downlink
Dial Return
18. The relative strength over a three dimensional area of all the electromagnetic energy an antenna sends or receives.
MIMO (Multiple Input-Multiple Output)
ESSID (Extended Service Set Identifier)
Radiation pattern
Hot Spot
19. 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.
Radiation pattern
Mobile Wireless
Fading
Multipath signals
20. A method of satellite Internet access in which a subscriber receives data via a satellite downlink transmission - but sends data to the satellite via an analog modem (dial-up) connections.
Active Scanning
Wireless Broadband
WLAN
Dial Return
21. The geographical area in which signals issued from an antenna or wireless system can be consistently and accurately received.
Scattering
5 GHz
5 GHz Band
Range
22. Networks that transmit signals through the atmosphere via radio frequency (RF) waves.
802.11 signals travel farther than Bluetooth signals- 802.11 technologies transmit data at higher throughputs than Bluetooth.
Active Scanning
Mobile Wireless
WLAN
23. An area covered by a wireless access point that provides visitors with wireless services - including Internet access.
Stations
Association
Downlink
Hot Spot
24. In 802.11 wireless networking - a type of frame issued by a station during active scanning to find nearby access points.
Diffraction
Probe
802.11 transmission requirement that contributes to its inefficiency
Wireless Gateway
25. 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.
Dial Return
Access Point
iwconfig
Omnidirectional Antenna
26. 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
iwconfig
Scattering
LEO (Low Earth Orbiting)
Passive Scanning
27. In IEEE terminology - the identifier for a BSS (basic service set)
GEO (Geosynchronous Orbit or Geostationary Orbit)
LOS (Line of Sight)
Channel Bonding
BSSID (Basic Service Set Identifier)
28. Why are the 802.11b and 802.11g wireless transmission technologies more commonly used on business LANs than Bluetooth?
WLAN
2.4 GHz
Wireless Router
802.11 signals travel farther than Bluetooth signals- 802.11 technologies transmit data at higher throughputs than Bluetooth.
29. 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
Hot Spot
Wireless
Satellite Return
5 GHz
30. 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.
Bluetooth Special Interest Group (SIG)
2.4 GHz Band
Wireless Router
Wireless Broadband
31. 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.
GEO (Geosynchronous Orbit or Geostationary Orbit)
FHSS (Frequency Hopping Spread Spectrum)
Access Point
Reassociation
32. A wireless networking standard that uses FHSS signaling in the 2.4GHz band to achieve a maximum throughput of either 723 Kbps or 2.1 Mbps - depending on the version. Bluetooth was designed for use primarily with small office or home networks in which
Downlink
Bluetooth
Mobile Wireless
LOS (Line of Sight)
33. A group of access points and associated stations (or basic service sets) connected to the same LAN.
Passive Scanning
RTS/CTS (Request to Send/Clear to Send)
5 GHz
ESS (Extended Service Set Identifier)
34. Which techniques help to reduce overhead in 802.11n wireless transmission?
Frame aggregation - Channel bonding
Diffraction
Site Survey
A beacon frame
35. 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.
Reflection
Wireless Broadband
Infrastructure WLAN
Dial Return
36. 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.
Satellite Return
5 GHz Band
Mobile Wireless
SSID (Service Set Identifier)
37. 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
Narrowband
Stations
RTS/CTS (Request to Send/Clear to Send)
38. A destination node must issue an acknowledgment for every packet that is received intact.
802.11 transmission requirement that contributes to its inefficiency
Fixed Wireless
Omnidirectional Antenna
WLAN
39. Regulated radio frequency band - 1/3rd range of 802.11b or g - Usually found in corporate environments.
Transponder
Wireless Gateway
5 GHz
Wireless Spectrum
40. A unique character string used to identify an access point on an 802.11 network.
ESS (Extended Service Set Identifier)
Narrowband
SSID (Service Set Identifier)
Fixed Wireless
41. A special identifier shared by BSSs that belong to the same ESS.
Probe
Multipath signals
ESSID (Extended Service Set Identifier)
Wireless Gateway
42. An access point that provides routing functions.
Wireless Router
Passive Scanning
WLAN
Scattering
43. Which type of satellites is used to provide satellite Internet access?
Geosynchronous orbit
802.11 transmission requirement that contributes to its inefficiency
Radiation pattern
Wireless Broadband
44. 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.
Diffraction
Directional Antenna
Multipath signals
Dial Return
45. An antenna's _______ _______ describes the relative strength over a three-dimensional area of all the electromagnetic energy the antenna sends or receives.
Wireless Broadband
Radiation Pattern
Multipath signals
Fixed Wireless
46. ISM Range - Radio frequency band that may experience home appliance interference - Unregulated radio frequency band.
2.4 GHz
Probe
802.11 transmission requirement that contributes to its inefficiency
Multipath signals
47. Omnidirectional
ESSID (Extended Service Set Identifier)
To transmit and receive signals to and from multiple nodes in a three-storey house - what type of antenna should an access point use?
Stations
Wireless Broadband
48. 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
Wireless Gateway
In the 802.11 standard - IEEE specifies what type of access method?
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
SSID (Service Set Identifier)
49. In the context of wireless networking - the process of a station establishing a connection (or associating) with a different access point.
SSID (Service Set Identifier)
Omnidirectional Antenna
Scattering
Reassociation
50. If your wireless stations are configured to perform passive scanning - what do they need from an access point to initiate association?
Scattering
A beacon frame
Spread Spectrum
Active Scanning