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






3. 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






4. A. CSMA/CA






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






6. 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.






7. 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.






8. 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






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






10. 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.






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






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






13. 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






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






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






16. 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






17. 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






18. 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.






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






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






21. 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.






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






23. 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.






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






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






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






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






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






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






30. 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.






31. 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.






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






33. 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






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






35. 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.






36. An access point that provides routing functions.






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






38. 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






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






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






41. 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.






42. 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)






43. Omnidirectional






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






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






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






47. 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.






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






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






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