SDN vs SD WAN: Key Differences Explained Simply

Published: 21 Jan 2025

SD-WAN vs SDN

Software-defined wide area networks (SD-WANs) and software-defined networking (SDNs) both use software to manage network traffic, but they serve different purposes. While SDN focuses on centralized control of the entire network infrastructure, SD-WAN specifically optimizes wide area networks by managing data traffic between different locations. Think of SD-WAN as a smart traffic controller for your network, while SDN is more like the overall blueprint of the network itself.

Table of Content

SD-WAN vs SDN
What is the Difference Between SDN and SD-WAN?
Conclusion about SDN vs SD-WAN
FAQS - SD WAN and SDN

What is the Difference Between SDN and SD-WAN?

SDN (Software-Defined Networking) and SD-WAN (Software-Defined Wide Area Network) are software-driven networking approaches that enhance network management, yet they are designed for distinct roles and operate in varied scenarios.

SDN	SD-WAN
SDN stands for (Software-Defined Networking).	SD-WAN refers to a Software-Defined Wide Area Network.
A network design that splits control and data functions.	Connecting multiple remote branch offices securely.
Managing a data center’s network architecture.	A technology that optimizes and manages WAN traffic.
Centralized control of network resources and data flows.	Optimizing wide-area network traffic and connectivity.
Applies to entire networks, including data centers.	Focuses on wide-area networks (WANs), especially remote sites.
Large-scale network management in data centers and enterprises.	Branch office connectivity and cloud application access.
Centralized control over routers, switches, and firewalls.	Centralized control over WAN traffic policies and routes.
More complex, requiring infrastructure changes.	Easier to deploy with minimal impact on existing infrastructure.
Primarily used for local or enterprise networks.	Used to manage wide-area connections (MPLS, broadband, LTE).
Controls all traffic flows in the network.	Controls traffic flows between branch offices and cloud.
Uses protocols like OpenFlow, NetConf, etc.	Uses SD-WAN specific protocols to manage WAN traffic.
Can integrate with cloud networks for virtualized functions.	Primarily focuses on cloud performance for remote sites.
Security features are built-in at the network layer.	Enhanced security for WAN traffic via encryption and segmentation.
Dynamic routing based on network load and policies.	Dynamic routing based on performance and link quality.
Requires complex network configuration and management.	Easier configuration with cloud-based management.
Requires dedicated hardware and software for implementation.	Can work with existing WAN infrastructure and connections.
Virtualizes all network resources like switches and routers.	Primarily virtualizes WAN resources for remote access.
Manages bandwidth based on network-wide needs.	Optimizes bandwidth use across various WAN connections.
Provides network flexibility to support dynamic workloads.	Provides flexibility in routing traffic based on network performance.
Often more expensive due to infrastructure changes.	Cost-effective, often replacing MPLS with broadband.

Conclusion about SDN vs SD-WAN

Understanding the distinctions between SDN and SD-WAN opens up a world of opportunities to revolutionize network management and performance. Both technologies offer unique benefits, empowering businesses to adapt to modern networking challenges. Dive deeper into SDN and SD-WAN to discover how they can transform your network infrastructure and drive innovation in your organization.

FAQS – SD WAN and SDN

What is the meaning of SD-WAN?

SD-WAN refers to Software-Defined Wide Area Network, a solution designed to enhance the management and efficiency of WAN connections.

How does SD-WAN work?

SD-WAN uses software to intelligently route traffic over multiple connections, such as MPLS, broadband, or LTE, optimizing performance and reducing costs.

What is SD-WAN used for?

SD-WAN is used to connect remote sites, optimize application performance, and ensure secure access to cloud and enterprise resources.

Why should businesses choose SD-WAN?

Businesses should choose SD-WAN for its cost efficiency, improved network performance, enhanced security, and ease of management.