A smart building has IP addresses for its electrical devices from CCTV, alarms, phones, fire and entry systems to complex heating, ventilation and lighting systems, networked together.

Your own phone or tablet has an IP address which simply identifies the route it connects to the internet and other devices.

An IP address can be given to almost any electrical device to allow it to be controlled over the internet .e.g. a kettle can be turned on by phone from your car.