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CompTIA Server+

Category - Server

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Which of the following is the IRQ that can be used by either COM 1 or COM 3?

Explanation

Answer - A - IRQ 4 is used by either COM1 or COM3.

Key Takeaway: IRQ, or Interrupt Request, is a special numbered channel that is used by devices to get the processor’s attention. By default, COM 1 and COM 3 use IRQ 4, and COM2 and COM4 use IRQ3. The system timer uses IRQ 0, and the keyboard uses IRQ 1.

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