Read more on anycast. Anycast lets different computers advertise the same IP address from multiple places. When your computer tries to talk to that IP address (

Read more on anycast. Anycast lets different computers advertise the same IP address from multiple places. When your computer tries to talk to that IP address (over whatever protocol you chose) the network sends that traffic to the “closest” computer advertising that IP address. TCP builds a reliable stream on top of unreliable IP packets. Since which computer is “closest” rarely changes, your stream will keep being sent to the same server. When that server stops advertising the IP, then the data will get sent to a different server which will say “I don’t know what you are talking about, Reset your stream” and the tcp connection will close, basically.