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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 ______ ______ 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.






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






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






4. 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.






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






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






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






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






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






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






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






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






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






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






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






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






19. 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.






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






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






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






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






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






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






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






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






28. 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.






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






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






31. 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.






32. 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






33. 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.






34. 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.






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. 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






37. 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






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






39. 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






40. 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)






41. 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.






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






43. 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.






44. 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.






45. 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.






46. 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.






47. 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






48. 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.






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






50. 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