100-140 Question 76
Single answerA user reports that they are unable to connect an older serial device to their computer using the built-in serial port. Upon inspection, you notice the device uses a DB25 connector, while the computer's serial port is a DB9 connector. What is the most appropriate solution to resolve the issue?
- A
Use a DB25-to-DB9 adapter to connect the device to the computer.
- B
Replace the built-in serial port with a new one that has a DB25 connector.
- C
Use a USB-to-serial adapter that supports DB25 connections.
- D
Update the computer's BIOS to enable support for DB25 connectors.
Show answer and explanation
Correct answer: A
Explanation
Serial ports come in different connector types, such as DB25 and DB9. When there is a mismatch between the device's connector and the computer's serial port, using a hardware adapter (like a DB25-to-DB9 adapter) is the most efficient and cost-effective solution to ensure compatibility. Other options, such as replacing hardware or updating the BIOS, are unnecessary for this scenario.
- A. Correct.
Using a DB25-to-DB9 adapter is the correct solution since it allows physical compatibility between the older DB25 connector on the device and the DB9 connector on the computer's serial port.
- B. Incorrect.
Replacing the built-in serial port is an unnecessary and costly solution, especially when adapters are available to resolve the issue.
- C. Incorrect.
A USB-to-serial adapter is not required in this scenario because the computer already has a serial port. The issue is only a mismatch in connector types.
- D. Incorrect.
Updating the BIOS will not resolve the issue because the problem is hardware-related (connector mismatch) and unrelated to BIOS settings.