The screen suddenly washed over with green text. It wasn't a website. It wasn't a server. It was a command line interface that bypassed his operating system entirely. His heart hammered against his ribs. He hadn't pressed 'enter' on a browser; he had queried the fundamental architecture of the local network.

At its core, is a unique identifier. While it may look like a random jumble of characters, it typically serves one of three primary purposes: