Category: Uncategorized
Network Port Ranges: Well-Known, Registered, and Dynamic Ports
Learn how IANA divides network ports into well-known, registered, and dynamic ranges. The guide also explains why a registered port does not identify a running service and why a system's ephemeral-port range may differ.
ChatGPT / GPT-5.6 or GPT-6 Astra? Choosing a Model by Task
Choose a ChatGPT model and reasoning level based on task complexity, speed, and the quality you need. This guide explains when GPT-5.6, GPT-6 Astra, higher reasoning, or a Pro option may be useful for writing, coding, and analysis.