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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 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






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






3. 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.






4. 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)






5. 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






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






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






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






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






10. 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.






11. 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.






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






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






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






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. An access point that provides routing functions.






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






18. 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






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






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






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






22. 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






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






24. 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.






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






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






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






28. Omnidirectional






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






30. 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.






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






32. 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.






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






34. 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.






35. 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.






36. 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






37. 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.






38. A. CSMA/CA






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. 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.






41. 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






42. 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.






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






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






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






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






47. 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.






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






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






50. 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.







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