Internet communication is required to complete the process of license activation. If you are not connected to the Internet when you install an Autodesk product, you can operate in trial mode for a specified period, typically 30 days. When you choose to activate the software and enter your registration data, your computer communicates with Autodesk over the Internet. An activation code is provided for you to enter in the fields of a product dialog box. The Internet is also used to communicate with Autodesk for other purposes such as authorizing access to websites, downloading service packs, and sending product support messages.