WebRTC: Matching up nearest peers

Question

Given a single public IP address (peer A) and a list of many other public IP addresses (a mix of IPv4 and IPv6 addresses), what is the easiest way to match up peer A the IP addr

Answer 1

The easiest way to find the nearest peers, would be to send each of the peers an echo request and measure the time it takes to get a response, like ping does.