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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. Omnidirectional






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






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






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






6. 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






7. An access point that provides routing functions.






8. 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






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






10. 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.






11. 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






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






13. 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






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






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






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






17. 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.






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






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






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






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. 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.






23. 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






24. 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.






25. 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.






26. 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.






27. 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.






28. 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.






29. 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.






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






31. 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






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






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






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






35. 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.






36. 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.






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






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






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






40. 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)






41. The range of radio frequencies from 2.4 to 2.4835 GHz. This band allows for 11 unlicensed channels - and is used by WLANs that follow the popular 802.11b and 802.11g standards.






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






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






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






46. 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.






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






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. 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






50. 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