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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 - the process in which a station listens to several channels within a frequency range for a beacon issued by an access point.






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






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






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






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






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






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. A. CSMA/CA






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






11. 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






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






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






14. 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.






15. 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.






16. 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.






17. 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






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






19. 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.






20. 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)






21. An access point that provides routing functions.






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






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






24. 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.






25. 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






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






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






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






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






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






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






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






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






34. 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.






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






36. 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.






37. 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.






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






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






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






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






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






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






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






45. 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.






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






47. Omnidirectional






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






49. 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






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