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






2. 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






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






4. 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.






5. An access point that provides routing functions.






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






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






8. 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.






9. 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






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






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






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






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






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






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






16. 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.






17. 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.






18. 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.






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






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






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






22. 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






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






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






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






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






27. 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.






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






29. 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.






30. 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.






31. 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.






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






33. 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.






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






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






37. Omnidirectional






38. 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






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






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






41. 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.






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






43. A. CSMA/CA






44. 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






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






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






47. 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.






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






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






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