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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. 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.






2. 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






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






4. 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






5. 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.






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






7. 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.






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






9. 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






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






11. 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






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






13. 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.






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






16. A. CSMA/CA






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






18. 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.






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






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






21. 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.






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






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






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. 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.






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






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






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






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






30. 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.






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






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






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






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






35. 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.






36. 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.






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






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






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






40. 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






41. 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






42. 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.






43. Omnidirectional






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






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






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






47. 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






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






49. 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






50. 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.