Which of the following is the BEST tool to troubleshoot a DB-9 port?()A、Ohm meterB、Anti-static wrist strapC、OscilloscopeD、Loopback plug
Which of the following is the BEST tool to troubleshoot a DB-9 port?()
- A、Ohm meter
- B、Anti-static wrist strap
- C、Oscilloscope
- D、Loopback plug
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