Wireless networking quiz 2 | Computer Science homework help

1.         How long is a RIFS?A.         2 microsecondsB.         10 microsecondsC.         16 microsecondsD.         9 microseconds 2.         What guard interval is used with 64-QAM by 802.11n HT devices to reach 600 Mbps data rates?A.         800 nsB.         200 nsC.         100 nsD.         400 ns 3.         When two RF signals on the same frequency arrive at a receiver at the exact same time and their peaks and valleys are in alignment, what is true about these signals? (choose all that apply)A.         They are 180 degrees out of phaseB.         They are 90 degrees out of phaseC.         They have 0 degrees of separationD.         They are in phase 4.         What is the cause of Free Space Path Loss? A.         Beam ReflectionB.         Beam AbsorptionC.         Beam DiffractionD.         Beam Divergence 5.         Which of the following are units of power?A.         dBiB.         WattC.         MilliwattD.         dBdE.         dBm 6.         A single milliwatt = 0 decibels of change.A.         TrueB.         False 7.         Which of the following increase amplitude?A.         Lightning arrestorsB.         RF CablesC.         Pig tail adaptorsD.         AntennaeE.         Amplifiers 8.         More than 40% blockage in the Fresnel Zone will not impede an RF link.A.         TrueB.         False 9.         Which of the following describes a behavior of waves?A.         FrequencyB.         PhaseC.         ModulationD.         Amplitude 10.        Phase is a standard measurement of RF wave size.A.         TrueB.         False 11.        In an ERP 802.11 network, there are two mandated spread spectrum technologies.A.         TrueB.         False 12.        ERP-OFDM stations can not connect with OFDM AP’s because the use different __________.A.         Contention methodsB.         Modulation techniquesC.         FrequenciesD.         Coordination functions 13.        Which data rates are supported by PBCC?A.         6, 12, and 24 MbpsB.         36, 48 and 54 MbpsC.         1, 2, 5.5 and 11 MbpsD.         22 and 33 MbpsE.         1, 2, 5.5, 11, 22, and 33 Mbps 14.        How many adjacent non-overlapping channels may be used in the same physical area using the 2.4 GHz spectrum?A.         14B.         11C.         6D.         3 15.        The area of coverage provided by an AP is called which of the following?A.         BSSB.         ESSC.         BSAD.         WLAN 16.        The function of an AP is most closely related to which wired networking device?A.         A SwitchB.         A HubC.         A routerD.         A firewall 17.        What is the largest channel size possible with 802.11ac?A.         40 MHzB.         80 MHzC.         120 MHzD.         160 MHz 18.        What is required for stations to use 256-QAM?A.         they must have a firmware upgradeB.         there can be no more then 2 stationsC.         they must be very close to the APD.         they must be far from the AP 19.        The period of time that exist between wireless frames is called __________.A.         Duration/ID fieldB.         NAV ValueC.         Interframe SpaceD.         Carrier Sense 20.        What are the two ways carrier sense is performed? (Choose two)A.         Virtual Carrier SenseB.         Physical Carrier SenseC.         Logical Carrier SenseD.         DCF Carrier SenseE.         HCF Carrier Sense 21.        What are the two frames used in active scanning? (Choose two)A.         Beacon Management FrameB.         Probe Response FrameC.         Clear to Send FrameD.         Ready to Send FrameE.         Probe Request Frame 22.        Which of the following devices are said to be parts of a Specialty WLAN Infrastructure (Choose all that apply)A.         Autonomous AP’sB.         Lightweight AP’sC.         Wireless Workgroup BridgesD.         PTMP BridgesE.         WLAN Controllers 23.        Many Law Enforcement agencies use frequency managers.A.         TrueB.         False 24.        When designing wireless networks, two concepts often conflict.  What are they? (Choose two)A.         CapacityB.         ChannelC.         Antenna typeD.         Transmit PowerE.         Coverage 25.        The standard as amended defines which PoE device types?A.         LegacyB.         PSEC.         PDD.         Proprietary 26.        Which if the following is responsible for enrolling client devices?A.         Mobile DeviceB.         AP/WLAN ControllerC.         MDM ServerD.         Push notification server 27.        What are the three main components of the 802.1X/EAP Framework?A.         Authentication, Authorization, AccountingB.         Authentication Server, Authentication Client, Authentication AccountantC.         Authenticator, Supplicant, Authentication ServerD.         Authentication Guest, Authentication member, Authentication Server 28.        A spectrum analyzer can be used to locate the source of which type of intentional attack?A.         RF JammingB.         Overlapping adjacent channel interferenceC.         Bit FlippingD.         Duration field spoofing 29.        What is a primary concern when planning WLAN deployments within the government vertical market?A.         CostB.         Channel UseC.         SecurityD.         Capacity 30.        A facilities escort may be required when conducting a site survey.A.         True B.         False

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