O
- OC
-
Optical Carrier. In SONET, Optical Carrier levels indicate the transmission rate of digital signals on optical fiber.
- OSI
-
Open System Interconnection. Standard reference model for how messages are transmitted between two points on a network.
- OSPF
-
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).
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