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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 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.






2. 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






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






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






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






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






7. A. CSMA/CA






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






9. 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.






10. 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.






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






12. 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.






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






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






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






16. 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.






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






18. 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.






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






20. 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.






21. An access point that provides routing functions.






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






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






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






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






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






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






28. 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.






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






30. 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






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






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






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






34. 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.






35. 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.






36. 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)






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






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






39. 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.






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






41. 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






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






43. 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.






44. 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






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






46. 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.






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






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






49. 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






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