Exporting a GNS$3$ project involves a few steps to ensure that it can be opened and run after submitting the project without any issues. Here's a step$-$by$-$step guide:

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Open your GNS$3$ project.

Ensure that all devices in your topology are powered off. This is important to avoid any configuration mismatch or corruption.

Save your project.

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Go to the menu in GNS$3.$

Select $.$

Choose a location to save the exported project. This will save the project as a file.

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If your project uses any external files $($like custom IOS images, scripts, or other resources$),$ you need to ensure they are included in the exported project or provided separately.

It's a good practice to keep all external files within the GNS$3$ project directory to ensure they get included during the export.

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You can now share the file with the recipient. This file can be sent via email, cloud storage, or any other filesharing method.