An Internet browser is used to facilitate license activation. After installing your 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 returned and you are not prompted again during startup. The Internet is also used to communicate with Autodesk for other purposes such as authorizing access to the Subscription Center, downloading service packs, and sending product support messages.