【单选题】Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which pe...
【简答题】a start-up company, macrotech, plans to produce a device to translate morse code to a written message on a home computer and to send written messages in morse code voer the airwaves. the device is pri...
【简答题】a company plans to produce a device. the president estimates that it would require a $30,000 initial investment. each unit costs him $20 to produce and each sells for $85. how many units must be sold ...
【单选题】You have 10 hosts plus a server connected to a switch. Each device is running 10Mbps halfduplex.What is the bandwidth available for each device when it communicates to the server?