Description: A flow table is a data structure used by network devices, such as routers and switches, to store information about active flows. In the context of Software-Defined Networking (SDN), these tables are fundamental for managing and controlling data traffic in the network. Each entry in the flow table contains key information, such as source and destination addresses, the protocol used, and the actions to be taken regarding packets that match those criteria. This allows network devices to make informed decisions about how to handle traffic, thereby optimizing network performance. Flow tables are dynamic and can be updated in real-time, enabling network administrators to quickly adapt to changes in traffic or network configuration. Furthermore, their use in SDN allows for greater flexibility and control, as routing and traffic handling decisions can be centralized and programmed through software, rather than relying solely on the internal logic of each network device. This ability to efficiently program and manage data flows is one of the most notable features of software-defined networks, facilitating the implementation of security policies, quality of service, and bandwidth optimization.
