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Wireless Networking Vocab

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. 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.






2. An antenna's _______ _______ describes the relative strength over a three-dimensional area of all the electromagnetic energy the antenna sends or receives.






3. An area covered by a wireless access point that provides visitors with wireless services - including Internet access.






4. A group of access points and associated stations (or basic service sets) connected to the same LAN.






5. A command-line utility for viewing and setting wireless interface parameters on Linux and UNIX workstations.






6. What frequency band is used by Bluetooth - 802.11b - and 802.11g?






7. 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






8. 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.






9. 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






10. A destination node must issue an acknowledgment for every packet that is received intact.






11. Which techniques help to reduce overhead in 802.11n wireless transmission?






12. In ________________ - a signal jumps between several different frequencies within a band in a synchronization pattern known only to the channel's receiver and transmitter.






13. The signals made of electromagnetic energy that travel through the atmosphere.






14. A unique character string used to identify an access point on an 802.11 network.






15. A. CSMA/CA






16. A connection from an orbiting satellite to an Earth -based receiver.






17. The process a wireless station undergoes to find an access point.






18. An access point that provides routing functions and is used as a gateway.






19. An access point that provides routing functions.






20. 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.






21. The geographical area in which signals issued from an antenna or wireless system can be consistently and accurately received.






22. 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.






23. The relative strength over a three dimensional area of all the electromagnetic energy an antenna sends or receives.






24. 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.






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)






26. Because of reflection - diffraction - and scattering - wireless signals follow a number of different paths to their destination.






27. Networks that transmit signals through the atmosphere via radio frequency (RF) waves.






28. In the context of wireless networking - a frame issued by an access point to alert other nodes of its existence.






29. 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






30. 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.






31. ISM Range - Radio frequency band that may experience home appliance interference - Unregulated radio frequency band.






32. Regulated radio frequency band - 1/3rd range of 802.11b or g - Usually found in corporate environments.






33. In the context of wireless networking - the process of a station establishing a connection (or associating) with a different access point.






34. A small (usually home) network composed of personal communications devices.






35. The term used to refer to a satellite that maintains a constant distance from a point on the equator at every point in its orbit. Geosynchronous orbit satellites are the type used to provide satellite Internet access.






36. In wireless networking - the process that describes a station moving between BSSs without losing connectivity.






37. This type of propagation uses the least amount of energy and results in the reception of the clearest possible signal.






38. The use of multiple frequencies to transmit a signal. (because the signal is spread out over the wireless spectrum)






39. 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.






40. In IEEE terminology - the identifier for a BSS (basic service set)






41. A consortium of companies - including Sony Ericsson - Intel - Nokia - Toshiba - and IBM - that formally banded together in 1998 to refine and standardize Bluetooth technology.






42. If your wireless stations are configured to perform passive scanning - what do they need from an access point to initiate association?






43. A type of wireless LAN in which stations communicate directly with each other (rather than using an access point)






44. 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






45. 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






46. 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






47. 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






48. 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






49. A special identifier shared by BSSs that belong to the same ESS.






50. 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.