Since C# and the .NET Core runtime will abstract away most of the details of IP interactions from our application software, this demonstration will be relatively simple. What we're going to write is a simple web API that simulates a DNS name resolution. We'll use a simple JSON file to store domain names and their associated addresses and provide an instance of the IPAddress class (or a list of instances of it) as our response. This will demonstrate how the language provides a lot of parsing and negotiation behind the scenes for you, and how that can streamline your development process considerably. And since we've been working with IP addresses and ports throughout this book, much of this should seem familiar to you.