What does OSPF stand for?

OSPF stands for Open Shortest Path First. This protocol is a widely used link-state routing protocol that operates within an Autonomous System (AS) in Internet Protocol (IP) networks. The name reflects the protocol's operation, where it finds the shortest path for data to travel from source to destination based on various metrics, primarily cost, using a method called the Dijkstra algorithm.

The term "Open" signifies that the protocol is an openly published standard, which promotes interoperability between networking devices from various manufacturers. "Shortest Path First" indicates that the key objective of OSPF is to determine the most efficient route, ensuring optimal routing and network performance.

Other options do not represent the actual definition of OSPF, as they refer to unrelated protocols or concepts. Thus, understanding the meaning of Open Shortest Path First provides essential context into its functionality and importance in networking.