Change Port Command in Windows: A Practical Guide

Change Port Command in Windows is easier to understand when the core ideas are paired with practical examples. The sections below explain the topic clearly, highlight useful steps, and point out details that can prevent common errors.

Applies to: Windows Server (Semi-Annual Channel), Windows Server 2016, Windows Server 2012 R2, Windows Server 2012.

The change port command lists or changes COM port mapping for compatibility with MS-DOS applications. To learn examples of how to use this command, please see the Example below.

Note

In Windows Server 2008 R2, Terminal Services has been renamed to Remote Desktop Services.

Syntax command change port

 change port [= | / d | / query]

Parameters

Parameter Description = Map COM to. / d Delete mapping for COM < PortX >. / query Displays the current port mapping. /? Show help at the command prompt.

Note

Most MS-DOS applications only support COM1 via COM4 serial port. The change port command maps the serial port to a number of other ports, allowing applications that do not support the high-numbered COM port to access the serial port. The remapping only works for the current session and cannot be retained if you log out of the session and then log in again.
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FAQ

What is Change Port Command in Windows?

Applies to: Windows Server (Semi-Annual Channel), Windows Server 2016, Windows Server 2012 R2, Windows Server 2012.

Why is Change Port Command in Windows important?

A clear understanding of Change Port Command in Windows helps you make informed decisions, avoid common mistakes, and use the relevant tools or techniques more effectively.

How should beginners approach Change Port Command in Windows?

Start with the fundamental concepts, follow the examples step by step, and test each change in a safe environment before applying it to important systems or data.