Link distance is how far away something is when we use the internet to communicate with it. When we want to talk to something far away on the internet, we need to send our message through a series of connections called links. Each link connects two things together, like two computers or a computer and a router. Think of each link as a step, like taking one step at a time to walk from your bedroom to the kitchen.
The total number of steps determines how far away the thing we want to talk to is. If we need to take a lot of steps to get there, that means the link distance is far. If we only need to take a few steps, the link distance is close.
For example, if you want to watch a video on YouTube, you need to send a request from your computer to a server that stores the video. This request will go through many links, such as your Wi-Fi router, internet service provider, and different servers, until it eventually reaches the server with the video. The total number of links between your computer and the server determines the link distance, which can vary depending on where you and the server are located.
So, link distance is basically how far away something is on the internet, measured by the number of connections, or links, we need to make to reach it.