Cisco Systems' point man on the Internet of things (IoT) has resigned just as industries start to explore how millions of sensors and devices can be connected over networks. Cisco confirmed on Thursday that Guido Jouret, who was vice president and general manager of the company's Internet of Things Group, has left to "pursue a new opportunity." Rob Soderbery, senior vice president of Cisco's Enterprise Networking Group, which oversees the IoT division, will now oversee it directly, Cisco said.