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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. 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.






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






3. 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.






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






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






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






7. 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.






8. 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






9. 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.






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






11. 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.






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






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






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






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






16. 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.






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






18. 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






19. An access point that provides routing functions.






20. 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.






21. 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






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






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






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






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






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






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






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






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






30. 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.






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






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






33. 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.






34. 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.






35. Omnidirectional






36. 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.






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






38. 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.






39. 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






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






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






42. 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.






43. 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.






44. A. CSMA/CA






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






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






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






48. 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






49. 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)






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