Internet TCP port 3000 is commonly used by web-based applications and services for network communications. For instance, Ruby on Rails, a popular web application framework, uses port 3000 as its default port in the development environment. Additionally, Node.js, a JavaScript runtime, also often uses port 3000 for local development. Express.js, a web application framework for Node.js, also defaults to port 3000 for serving applications in a development environment.
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