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






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






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






4. 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.






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






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






7. 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.






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






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






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






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






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






13. 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.






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






15. 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






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






17. 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.






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






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






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






21. 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






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






23. 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.






24. 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.






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






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






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






28. 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.






29. 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.






30. A wireless networking standard that uses FHSS signaling in the 2.4GHz band to achieve a maximum throughput of either 723 Kbps or 2.1 Mbps - depending on the version. Bluetooth was designed for use primarily with small office or home networks in which






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






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






33. 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.






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






35. 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






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






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






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






39. Omnidirectional






40. 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






41. 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






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






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. 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.






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






46. An access point that provides routing functions.






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






48. 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






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






50. 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