A good item to keep in a CompTIA A+ certified technician’s toolkit is a null modem adapter. What’s a good reason to have a null modem adapter?
A) To connect two modems together without a serial port
B) To connect two computers via serial port without a modem
C) To connect a modem to a computer
D) To connect two modems and two computers together
The answer: B) To connect two computers via serial port without a modem
Null modem adapters change the wiring inside of a serial cable to allow direct connection between two computers without the need for a physical modem. This is often used to communicate to network device management ports or to transfer files over a serial connection.
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Want to know more? Watch “Connectors and Adapters.” Every personal computer cable connector is designed to provide a specific function, and some of these capabilities have changed dramatically through the years. In this video, you’ll learn about standard computer connectors and how to use cable adapters to change gender, connect serial connections, or extend network connections. |