A. peer-to-peer, videoconferencing, online photo-conferencing, net optical
B. sending and receiving devices, communication channel, connection device, and data transmission specifications
C. telephone lines, coaxial cables, fiber-optics cables, and communication channel
D. software, hardware, communication channel, network
B. sending and receiving devices, communication channel, connection device, and data transmission specifications
C. telephone lines, coaxial cables, fiber-optics cables, and communication channel
D. software, hardware, communication channel, network
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