WhichofthefollowingshouldatechnicianMOSTlikelyusetotestaRS-232port?（） A: Loopbackadapter B: Powersupplytester C: Thepingcommand D: Multimeter
WhichofthefollowingshouldatechnicianMOSTlikelyusetotestaRS-232port?（） A: Loopbackadapter B: Powersupplytester C: Thepingcommand D: Multimeter
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