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






2. 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.






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






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






5. Omnidirectional






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






7. 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






8. An access point that provides routing functions.






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






10. 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.






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






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






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. 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)






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






17. 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






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






19. A. CSMA/CA






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






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






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






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






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






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. A consortium of companies - including Sony Ericsson - Intel - Nokia - Toshiba - and IBM - that formally banded together in 1998 to refine and standardize Bluetooth technology.






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






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






29. 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






30. 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.






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






32. 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.






33. 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






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






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






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






37. 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.






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






39. 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.






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






41. 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






42. 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.






43. 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






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






45. 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.






46. 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.






47. 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.






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






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






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