Essentials:

Vertical Segment
Server

Cable Medium
Copper

Cabling Type
QSFP+ Direct Attach Copper Cable (Twin axial) (1-7m) / Intel 40GBASE-SR4 Optics also supported (Purchase Intel branded optics separately)

Bracket Height
OCP Form Factor (Mezz 2.0 Design Spec)

Ethernet Controller
Intel Ethernet Controller XL710-BM2

Networking Specifications:

Number of Ports
Single

System Interface Type
PCIe v3.0 (8.0 GT/s)

Intel Virtualization Technology for Connectivity (VT-c)
Yes

Speed and Slot Width
8.0 GT/s x8 Lanes

Controller
Intel XL710

Intel Virtualization Technology for Connectivity:

On-Chip QoS and Traffic Management
Yes

Flexible Port Partitioning
Yes

Virtual Machine Device Queues (VMDq)
Yes

PCI-SIG SR-IOV Capable
Yes

Advanced Technologies:

iWARP/RDMA
No

Intel Data Direct I/O Technology
Yes