WhichofthefollowingistheBESTtooltotroubleshootaDB-9port?（） A: Ohmmeter B: Anti-staticwriststrap C: Oscilloscope D: Loopbackplug
WhichofthefollowingistheBESTtooltotroubleshootaDB-9port?（） A: Ohmmeter B: Anti-staticwriststrap C: Oscilloscope D: Loopbackplug
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