Sputnik is a term often used in the INTERNET forums to describe when a user snags an IP address from another user. The Sputnik method of IP retrieval is simply to set up a server on your home computer then you place image files. When in a forum you simply send a private message with the image file and the server you set up will tell you the IP of the person viewing the image. This is called the Sputnik . The Sputnik was named after a widely popular INTERNET real life person that goes by the handle Sputnik.
Hey that guy got my IP by sending me an image file in a private message. Looks I got a sputnik.