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






2. A group of access points and associated stations (or basic service sets) connected to the same LAN.






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






4. 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.






5. 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.






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






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






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






9. 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






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






11. 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






12. 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.






13. 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






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






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






16. 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)






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






18. 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.






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






20. 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.






21. 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






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






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






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






25. 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.






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






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






28. 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






29. Omnidirectional






30. 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.






31. 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






32. 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.






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






34. 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.






35. 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






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






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






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






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






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






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






42. 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.






43. A. CSMA/CA






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






46. 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.






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






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






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