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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 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.






2. 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.






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






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






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






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






7. 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.






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






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






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






12. 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.






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






14. 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.






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






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






17. 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






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






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. 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. 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.






22. 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.






23. 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)






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






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






26. An access point that provides routing functions.






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






28. 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.






29. 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.






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






31. A wireless networking standard that uses FHSS signaling in the 2.4GHz band to achieve a maximum throughput of either 723 Kbps or 2.1 Mbps - depending on the version. Bluetooth was designed for use primarily with small office or home networks in which






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






33. A. CSMA/CA






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






35. 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






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






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






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






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






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






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






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






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






44. 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.






45. Omnidirectional






46. 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






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






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






49. 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.






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