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






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






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






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






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






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






7. 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.






8. 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






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






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






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






12. Omnidirectional






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






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






15. 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.






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






17. 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






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






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






20. 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






21. 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.






22. 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






23. 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.






24. 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)






25. 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.






26. 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.






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






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






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






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






31. A. CSMA/CA






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






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






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






35. 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.






36. 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.






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






38. 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.






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






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






41. 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






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






43. 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.






44. 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.






45. 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.






46. 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.






47. 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.






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






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






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