ISM 4220 EXAM 2 - Franks

ISM 4220 EXAM 2 - Franks In one sentence, what does Wi-Fi mean? - ANS Alliance of vendors claiming interoperability. Can a single access point handle the needs of a 100 employee company? - ANS No (only the smallest of companies can) What set of standards does Wi-Fi follow? - ANS 802.11 Which is more reliable; wired or wireless? - ANS Wired Why is wired more reliable? - ANS Propagation issues (and interference) What is the number one issue with Wi-Fi networks? - ANS Propagation issues Access points connect wireless devices to ____. - ANS Ethernet LAN Radio frequency is measured in ___. - ANS Hertz Which antenna type wastes more signal: Dish or Omni Directional? - ANS Omni Wi-Fi and Cellular mostly use which type of antenna: Dish or Omni Directional? - ANS Omni With a signal strength of 30 mW from 5 meters, what is the expected strength at 15 meters from the source? - ANS 3.33 mW INVERSE Square law s1 = (r1/r2)^2 Does a higher humidity level impact Wi-Fi signal? - ANS Yes, makes it worse What creates the largest amount of interference in Wi-Fi signals? - ANS Mulitpath Interference Do higher frequency signals attenuate faster than lower frequency signals? - ANS Yes Defined radio signal ranges used for a specific purpose, such as FM, are known as? - ANS Service Bands What 3 Wi-Fi channels do not overlap in frequencies? - ANS 1,6 and 11 Wi-Fi operating at 5GHz has a maximum channel size of ______. - ANS 160 MHz What does Media Access Control methods help with on a Wi-Fi network? - ANS Coordinating times when device transmit