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






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






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






4. 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.






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






6. A. CSMA/CA






7. 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






8. 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






9. 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.






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






11. 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.






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






13. 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.






14. 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.






15. 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)






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






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






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






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






20. In the context of 802.11n wireless networking - the ability for access points to issue multiple signals to stations - thereby multiplying the signal's strength and increasing their range and data-carrying capacity. Because the signals follow multipat






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. 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.






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






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






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






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






27. 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.






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






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






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






31. Omnidirectional






32. 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






33. 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.






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






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






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






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






38. 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






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






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






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






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






43. 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.






44. 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.






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






46. 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.






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






48. 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.






49. 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






50. 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.