The first step to using the resources exposed on a network is finding them. While this problem is easily solved on a LAN with only four computers, you can imagine how daunting a challenge it becomes when your context grows to the several billion devices actively connected to the internet. To ensure reliable delivery of requests broadcast on a network, each device on that network must be uniquely addressed, and any software that wants to communicate with a device must know the address of the target device. With this in mind, let's look at how the problem has been solved at scale and consider how we can apply that solution to our more locally-relevant use cases with .NET Core.