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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. 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.






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






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






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






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






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






8. 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






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






10. 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.






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






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






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






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






15. 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






16. 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.






17. 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.






18. 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






19. 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.






20. 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






21. 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.






22. 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






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






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






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






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






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






29. 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.






30. 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.






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






32. 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.






33. 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.






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






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






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






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






38. 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






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






40. 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






41. A. CSMA/CA






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






43. Omnidirectional






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






45. An access point that provides routing functions.






46. 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






47. 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.






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






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






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