Bluetooth is a （）technology.A、SatelliteB、MicrowaveC、Light waveD、Radio Frequency
Bluetooth is a （）technology.
- A、Satellite
- B、Microwave
- C、Light wave
- D、Radio Frequency
相关考题：
Whichofthefollowingcommunicationmethodswillprovidethemaximumbandwidthforvideostreamingthroughamediaextender?() A.100BaseTEthernetB.802.11gC.Z-WaveD.Bluetooth
What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received ________．A.No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequencyB.The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was receivedC.The Operator should immediately set continuous watch on VHF channel 70D.The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received
If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies, which frequency should you call on ?______.A.Calling frequencyB.Distress frequencyC.Urgency frequencyD.Working frequency
Which of the following communication methods will provide the maximum bandwidth for video streaming through a media extender？（）A、100BaseT EthernetB、802.11gC、Z-WaveD、Bluetooth
单选题When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.Aa distinctive signalBthe Morse Code signal for SOSCa computerized voice announcement of MaydayDyour vessel's International Radio Call Sign
单选题If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies，which frequency should you call on? （）ACalling frequencyBDistress frequencyCUrgency frequencyDWorking frequency
单选题When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）AAfter determining that the frequency or channel appears to be no longer in useBAfter determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsCAfter the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedDRoutine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
单选题Details of coast radio stations and radar stations can be found in（）.AAdmiralty ChartBAdmiralty Light listCAdmiralty List of Radio SignalsDAdmiralty Notices to Mariners
单选题Which value is NOT supported by Cisco Spectrum Expert， when checking for RF coverage？（）AAccess point received-signal strength levelBSpectrum utilizationCClient data rateDIn-band radio frequency interference
单选题Whenever your marine radio is on，FCC Rules require you to monitor（）.Aa commercial ship-to-ship channelBthe last frequency that was usedCthe distress and calling frequencyDthe radio only if expecting a call
单选题The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.ApersistenceBpulse repetition rateCpulse lengthDresolution
单选题A flashing light is a light that（）.Aflashes at regular intervals at a frequency of 120 flashes or more per minuteBis yellow in colorCis visible over an arc of the horizon of not less than 180°nor more than 225°DAll of the above
单选题（） is (are) not power supplied by main switchboard directly.ASteering gear and windlassBNavigation light and radio power panelCNavigation device power boxDDaily fresh water pump
单选题What is the fundamental purpose for imposing radio silence? （）ATo ensure that interference to proprietary communications is minimizedBTo ensure that only voice communications can be effected on the distress frequency or channelCTo ensure that a distressed vessel will have a window twice each hour for transmitting routine messagesDTo ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized
单选题When can routine communications be resumed when radio silence has been imposed?（）AAfter determining that the frequency or channel appears to be no longer in useBAfter determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsCRoutine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedDIf，in the Master's opinion，communications on that frequency will interfere with emergency communications
单选题How is “radio silence” imposed?（）ABy the On Scene Coordinator (OSC)BBy the Coast Earth Station (CES) controlling the distress communications on that frequencyCIt is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channelDIt is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel