Thunderbolt™ technology is a transformational high-speed, dual protocol I/O that provides unmatched performance with up to 40Gbps bidirectional transfer speeds. It provides flexibility and simplicity by supporting both data (PCIe , USB3.1) and video (DisplayPort) on a single cable connection that can daisy-chain up to six devices.
In addition, Thunderbolt™ Networking allows for the connection of two or more computers through a Thunderbolt cable.
Thunderbolt Networking uses the existing operating system’s network sharing functionality to connect the systems via an Ethernet connection. It allows the computers to share resources between themselves as well as connect to devices within the connection chain.