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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 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






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






3. 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






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






5. 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






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






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






8. 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






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






10. 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.






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






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






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






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






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






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






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






18. Omnidirectional






19. 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






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






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






23. 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.






24. 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.






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






27. 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.






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






29. 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.






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






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






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






33. An access point that provides routing functions.






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






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






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






38. 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.






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






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






41. 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.






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






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






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






45. 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.






46. A. CSMA/CA






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






48. 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






49. 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






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