Every once in a while I get asked if there is a better way to distribute firmware to phones across the WAN. The obvious driver is the general performance (or lack thereof) for the standard TFTP approach when handling a large number of requests. This is one of those questions that usually comes up the day before a mass firmware upgrade and then goes to the back burner, only to come up again during the next upgrade cycle. Nonetheless it is an important consideration and, fortunately, there are several options available to us.