Updated: Monday, November 30th 2020, 9:13:22 am


Software-Defined Networks- A way to secure networks

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In recent years, the foundation of network and system management has altered greatly. 

SDN stands for Software Defined Networking, and it’s a networking architecture that aims to improve network control and flexibility. It is most commonly associated with the open flow protocol and the ODIN V2 wireless communication protocol. Its architecture is centralized, flexible, and programmatically configurable. SDN disconnects the data planes and the control of the network. This network promotes network security by global network visibility, where a dispute from a logically central control plane can be readily addressed.

The software-Defined network was the answer to one of the most serious issues, which was that we had to manually configure all of the devices at times. SDN has made networks not only easier but also more secure to administer.

Software-Defined Network: A Security Network

Software-defined networks (SDNs) is an API network approach that communicates with the underlying hardware infrastructure and direct network traffic via software-basic controllers or application programming interfaces. In order to make their network programming adaptable, SDN gives the networking operators tremendous insight and gravity.

In the network sector, the SDN method is seen as another trend to address the issues of traditional linked devices that already exist. New developments have evolved in the area of information and communication technology in data and communication innovation. The software-defined network is undoubtedly the most widely used way of application distribution allowing companies to deploy their apps faster and to lower total development and running expenses. 

SDN guarantees to safeguard your organization against the latest advanced threats. The software-defined network has emerged as one of the flexible, secure and well-managed networks. SDN and a variety of SDN-based security apps are quick to gather momentum in cybercrime control.

Importance of Software-Defined Network

  • Increased Control With Greater Speed And Flexibility: Rather than manually programming multiple vendor-specific hardware devices, developers can program an open standard software-based controller to regulate the flow of traffic over a network. Network administrators have more networking equipment options because they can communicate with any number of hardware devices via a central controller using a single protocol.
  • Robust Security: By providing visibility across the entire network, a software-defined network allows for a more comprehensive view of security threats. SDN offers clear advantages over traditional networking as the number of internet-connected smart devices grows. Operators can divide devices into zones based on their security level, or immediately quarantine compromised devices to prevent them from spreading to the rest of the network.
  • Customizable Network Infrastructure: Administrators can configure network services and allocate virtual resources to change the network infrastructure in real-time using a software-defined network from a single centralized location. This enables network administrators to optimize data flow through the network and prioritize applications that require more uptime.

Benefits of Software-Defined Network

The software-Defined network has the benefit of a framework that supports high-data applications like Big Data and Virtualisation. SDN opens a new platform to design unique algorithms for security purposes. 

  • Centralized Network Provisioning: SDNs give businesses a unified view of their entire network, making network management and provisioning easier. More VLANs are being integrated into physical LANs, for example, creating a Gordian knot of links and dependencies. A software-defined network allows for a more comprehensive view of security threats by providing visibility across the entire network.
  • Granular Security: Centralized security is one of the most appealing features of security-defined networking to IT managers. As a result of virtualization, network management has become more difficult. As virtual machines become more integrated into physical systems, it becomes harder to use consistent firewall and content filtering policies. The security issue becomes even more complicated when you factor in complexities like securing BYOD devices.

The SDN Controller is a centralized point of control for uniformly disseminating security and policy information across the organization. The disadvantage of centralizing security control into a single entity, such as the SDN Controller, is that it creates a single point of attack. However, if implemented securely and properly, SDN can be used to effectively manage security across the enterprise.

  • Holistic Enterprise Management: Enterprise networks need to develop new apps and virtual machines on request to respond to new processing such as big data. SDN helps you to alter your IT department’s network setting without impacting your network. The SD controller removes control over the whole network so that no packet judgments can be taken by any device. Within the boundaries of proprietary hardware restrictions, this strategy allows organizations to increase network control.
  • Consistent and Timely Content Delivery: The power to change data traffic is one of the main advantages of a software-defined network. Data traffic and automation management facilitate the quality of IP, video and audio services in the implementation of voice. SDN also helps boost the highest quality videos, as SDN provides network reactivity and so improves user experience.
  • Lower Operating Costs: Cost savings should be realized as a result of administrative efficiency, higher server utilization, better virtualization control, and other benefits. Because many routine network administration issues can be centralized and automated, SDN should reduce overall operating costs and result in administrative savings, though real savings have yet to be demonstrated.
  • Cloud Abstraction: The cloud is here to stay and is transforming into a unified infrastructure. The SDN controller can manage all of the networking components that make up massive data center platforms.


Software-Defined networks improve network security by providing global network status awareness. Using software-defined networking, a large number of network nodes can be abstracted into a single user-friendly platform. This makes it simple and effective to maintain connections, deliver critical updates, and quarantine critical security issues. SDN helps to eliminate mundane and repetitive networking workflow tasks by reducing touch points and introducing automation capabilities. Centralization and programming of the Network Control Plane, on the one hand, might lead to efficient and scalable enforcement of the security system and new security challenges.