Software Defined Networks SDN
SDN = Software-Defined Networking.
It is a modern approach to computer networks, where the control of traffic and network equipment (switches, routers, etc.) is no longer done manually, through hardware configuration, but centralized and automated, through software.
How SDN works
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Separates the planes:
- Control plane (routing and traffic decision logic) – moved to a central software controller.
- Data plane (the part that actually moves packets through the network) – remains on the devices.
- The SDN controller manages the entire network and sends instructions to the devices.
- Administrators can manage the network through a software interface (API, dashboard) instead of configuring each switch/router manually.
SDN advantages
- Automation – changes are made quickly, through software.
- Scalability – easy to adapt when new servers or applications appear.
- Security – access policies can be applied centrally and uniformly.
- Cost reduction – less manual work, efficient use of resources.
- Agility – the network responds faster to the needs of applications and users.
In short: SDN = software-defined networks, more flexible and intelligent than traditional ones.
