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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. 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






2. 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






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






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






5. 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






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






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






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






9. 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.






10. In _____ - a transmitter concentrates the signal energy at a single frequency or in a very small range of frequencies.






11. 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






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






13. 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.






14. 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.






15. 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.






16. 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






17. 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.






18. A. CSMA/CA






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






20. 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.






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






22. 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.






23. 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.






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






25. An access point that provides routing functions.






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






27. Which type of satellites is used to provide satellite Internet access?






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






29. An end node on a network; used most often in the context of wireless networks.






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






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






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






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






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






35. Omnidirectional






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






37. 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






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






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






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






41. 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.






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






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






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






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






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






47. 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






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






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






50. 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.