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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. 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






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






4. 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






5. 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.






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






7. 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.






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






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






12. 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.






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






14. 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






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






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






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






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






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






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






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






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






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






24. 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.






25. 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.






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






27. 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






28. A. CSMA/CA






29. An access point that provides routing functions.






30. 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






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






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






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






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






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






37. Omnidirectional






38. 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






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






40. 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






41. 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.






42. 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






43. 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






44. 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.






45. 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.






46. 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.






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






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






49. 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.






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