The server responded: We can help you fix the bugs in your code. We can help you optimize your application. We can even help you find new features to add .

John's eyes widened. How did the server know his name? He typed Who are you? and hit enter.

Over the next few hours, John conversed with the server, discussing his project and receiving valuable advice. The server provided code snippets, debugging tips, and even suggestions for new features.

John was amazed. This server seemed to know an awful lot about his project. He decided to take the server up on its offer.

John was puzzled. He had no idea what process could be using that port, or what it was waiting for. He decided to try and connect to it using a tool like telnet . He typed telnet localhost 11501 and hit enter.