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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. 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)






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






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






4. 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.






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






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






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






8. 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.






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






10. 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.






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






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






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. 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.






16. 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






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






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






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






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






22. Omnidirectional






23. A. CSMA/CA






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






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






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






27. 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.






28. 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.






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






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






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






32. 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.






33. 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.






34. 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






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






36. 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.






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






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






39. 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.






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






41. 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






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






43. An access point that provides routing functions.






44. 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






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






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






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






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






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






50. 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.