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






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






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






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






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






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






7. 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






8. 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






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






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






11. 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.






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






13. 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.






14. 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.






15. On your Linux workstation - you open a terminal window and type at the command prompt iwconfig eth0 key 5c00951b22. What have you done?






16. 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






17. Omnidirectional






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






19. 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






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






21. 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






22. 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.






23. A. CSMA/CA






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






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






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






27. 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.






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






29. 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.






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






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






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






33. 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.






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






35. 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)






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






37. An access point that provides routing functions.






38. In 802.11 wireless networking - a type of frame issued by a station during active scanning to find nearby access points.






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






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






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






42. 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.






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






44. A type of WLAN in which stations communicate with an access point and not directly with each other.






45. 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.






46. Why are the 802.11b and 802.11g wireless transmission technologies more commonly used on business LANs than Bluetooth?






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






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






49. 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






50. 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