1. A method to monitor media exposure, the method comprising: receiving, at a first internet domain, a first request from a client computer, the first request indicative of access to the media at the client computer; determining if the client computer is known; if the client computer is not known, sending, from the first internet domain, a response to the client computer, the response to instruct the client computer to send a second request to a second internet domain, the second request to be indicative of the access to the media at the client computer; and if the client computer is known, logging an impression of the media.