While port numbers under 1024 are reserved for standard system services (like HTTP on port 80), higher numbers like 11501 are "user-defined" or "dynamic" ports. There are a few common scenarios where you might see this specific port in use:

Database Connectivity: Some specialized database drivers or middleware use 11501 as a default port to bridge connections between an application and a remote server.

If you encounter an error like "Connection Refused" or "Localhost:11501 not found," it usually means one of three things:

Development Frameworks: Specific web development stacks or internal tools within large tech companies sometimes hard-code high-numbered ports to avoid conflicts with common ports like 3000 or 8080.