How is Traditional Networking Different From SDN?

How is Traditional Networking Different From SDN?

Enterprise Networking Mag | Monday, March 29, 2021

The companies are using SDN instead of the traditional network to improve application performance and security. 

FREMONT, CA : Software-defined networking (SDN) is defined as "the unwinding of control and packet forwarding planes in the network." Utilizing application programming interfaces (APIs), SDN enables networks to connect to apps. SDN and APIs work together to improve application performance and security while also creating scalable, dynamic network architecture.

SDN is widely used for application deployment by businesses worldwide, allowing them to rapidly deploy their applications while lowering their deployment and operational expenses. IT administrators can use SDN to provision and manage network services from a single location.

What is a traditional network?

Traditional networking is the most common type of networking. It employs fixed-function and dedicated hardware and network devices, such as switches and routers, to manage network traffic. These devices each have unique functions that work well together and help to support the network.

Traditional networks often struggle with scalability. The majority of switching hardware and software is proprietary, and for APIs, it is uncommon to be exposed for provisioning.

How are SDN and traditional networking different?

SDN and traditional networking's main difference is that SDN is software-based, while traditional networking is typically hardware-based. Since SDN is software-based, it has greater scalability and flexibility. It also offers more control and simpler resource management for its users, enabling them to manage resources with the control plane virtually.

Traditional networks, unlike SDN, establish connections and operate networks using routers, switches, and other hardware and physical structures.

SDN controllers communicate with APIs through a northbound interface, encouraging application developers to program the network. Application developers programming the network using conventional networking protocols is the opposite of this interaction.

When compared to conventional networking, SDN can connect more effectively with hardware that is utilizing the network. SDN enables the users to provide new devices using software instead of physical infrastructure and helps IT administrators direct network paths and network services.

The most significant difference between SDN and traditional networking is highlighted due to virtualization. SDN can create an abstract copy of the network when it virtualizes the network. Users can provision the resources from a centralized location due to virtualization. 

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