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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. An access point that provides routing functions.






2. 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.






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






4. Omnidirectional






5. 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






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






7. 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.






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






9. 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.






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






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






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






14. 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






15. 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






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






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






18. 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.






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






20. 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.






21. 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)






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






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






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






25. 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.






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






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






28. 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






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






30. 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






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






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






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






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






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






36. 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.






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






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






39. 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.






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






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






42. 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.






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






44. 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






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






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






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






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






49. 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.






50. 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.