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






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






3. 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






4. 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.






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






6. 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.






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






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






9. 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.






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






11. 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.






12. Omnidirectional






13. 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.






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






15. 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.






16. 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.






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. 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






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






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






21. 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.






22. 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.






23. 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.






24. A. CSMA/CA






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






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






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






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






29. 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.






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






31. 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






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






33. 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






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






35. An access point that provides routing functions.






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






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






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






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






40. 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.






41. 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.






42. 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






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






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






45. 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.






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






47. 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.






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






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