SOLVED

11.What concept involves using a regular arrangement of transmitter–receiver systems? A. Spreading code B. Cellular C. Communication security D. Trunking 12.What percentage of the world’s population counts themselves as wireless subscribers? A. 50% B. 95% C. 25% D. 70% 13.What type of radio provides thepromise that licensed and unlicensed services can coexist in the same spectrum? A. Cognitive B. Two-way C. Adaptable D. Portable 14.Both analog and digital land-mobile systems depend on __________ to providewide-area coverage. A. software-based signal-processing B. repeaters C. ADC converters D. local oscillators 15.Which of the following is composed of bands of frequencies set aside by the Federal CommunicationsCommission (FCC) to support short-range, high-speed, wireless datacommunications? A.Unlicensed national information infrastructure(U-NII) B.Wireless local-areanetworks (WLANs) C.Wireless applicationprotocol (WAP) D.Radio frequencyidentification (RFID) 16.A _________ is an ad-hoc network of up to eightBluetooth devices, such as a computer, mouse, headset, or earpiece. A. backscatter B. mesh C. topology D. piconet 17.What is the basis of RFID tag classification? A.How theyobtain their operating power B.Their overall power consumption C.Their intended application D.How they store information 18._________involves the use of directional antennas to focus energy in preferred directionsat the expense of others. A. Channel setting B.Space-division multiplexing C.Sectorization D. Cell splitting 19.What causes Rayleigh fading, particularly in urban areas? A.Receiver picks up transmitted signal from multiple paths B.Issue of limited read distance C.Equipment failure or unfavorable path conditions D.Maximum range achievable varies inversely with frequency and data rate 20.What is the purpose of the vocoder? A.To compress voice data for transmission B.To expand voice data for transmission C.To provide voicemail services D.To double the voice handling capacity