Juniper Networks Field Guide and Reference

Optical Carrier. In SONET, Optical Carrier levels indicate the transmission rate of digital signals on optical fiber.

Open System Interconnection. Standard reference model for how messages are transmitted between two points on a network.

Open Shortest Path First. A link-state IGP that makes routing decisions based on the shortest- path -first (SPF) algorithm (also referred to as the Dijkstra algorithm ).