The existing DirectIP 1.0 protocol has two modes, DirectIP mode and IDIS mode. You have to reboot the camera to change each mode.
DirectIP 2.0 protocol is a unified form of two modes. Without rebooting, the protocol can take advantage of all the advantages of DirectIP mode and IDIS mode.

In DirectIP 2.0, a camera boots up as a DHCP client looking for a DHCP server for about 40 seconds. If no DHCP server is found, it starts up with a linked-local IP address.