Complex sentence: In order to support the same sort of device-to-device connection, USB requires additional support in dual-role devices to emulate a host and provide similar functionality, and was only standardized years later as part of USB On-The-Go system.
Split into simpler sentences: In order to support the same sort of device-to-device connection, USB requires additional support in dual-role devices to emulate a host and provide similar functionality. This was only standardized years later as part of USB On-The-Go system.