How to find out IP's on a Minecraft server?

I watched a video telling you how to get ips people on a minecraft server and in cmd i did tracert <the server ip> and then it listed some ips, and I was confused. How do I know which player was connected to which ip? So, to shorten this question, how do I connect the player who is online on the server to the ip found on cmd when the tracert command was done.

Google.
"How to portforward my router"
But you don't need to do that to host a minecraft server. You can use Hamachi or Tunggle to allow people to join you. Just google How to host a minecraft server with Hamachi.

If you can't figure out these two ways. Give up.