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Glossary

Software-Defined Networking (SDN)

Software-Defined Networking (SDN) is a network architecture that separates the control plane and the data plane in a network. The control plane is responsible for making decisions about how the network should operate, such as how data should flow and which routes should be used. The data plane is responsible for forwarding packets of data according to the decisions made by the control plane.

In traditional networking, these functions are integrated into a single device, such as a router or switch. However, in SDN, the control plane is implemented in software and is separated from the data plane. This allows the control plane to be centrally managed and programmatically controlled, making the network more flexible and agile.

SDN also enables network administrators to manage and automate network functions more easily, reducing manual configuration and speeding up the deployment of new services and applications. Additionally, SDN enables greater visibility into network operations and can improve network security by providing better control over network traffic.

Some use-cases are:

  1. Network virtualization: SDN can be used to create virtual networks that run on top of physical hardware, enabling organizations to isolate and secure different parts of their network infrastructure.

  2. Data center networking: SDN can be used to automate and simplify the management of data center networks, making it easier to provision and configure network resources and services.

  3. Cloud networking: SDN can be used to automate and optimize the management of cloud-based networks, providing increased visibility, security, and control over network traffic.

  4. WAN optimization: SDN can be used to optimize wide area networks (WANs), enabling organizations to improve network performance and reduce costs by dynamically routing traffic over the most efficient path.

  5. Network security: SDN can be used to improve network security by enabling organizations to enforce security policies, monitor network traffic, and respond to security threats in real-time.

Overall, SDN has the potential to improve the efficiency, scalability, and security of enterprise networks, and it is becoming increasingly important in the modern, highly connected business landscape.

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