The Use of Software Defined Networking Allows For a New Method of Controlling Data Packet Routing Through a Centralised Server


Using software based controllers or application programming interfaces (APIs) to communicate with the network's underlying hardware architecture and control traffic is known as software-defined networking (SDN). This architecture is distinct from conventional networks, which manage network traffic using specialised hardware (such as switches and routers). Through software, SDN can build and manage virtual networks or manage conventional hardware. While software-defined networking offers a new method of managing the routing of data packets through a centralised server, network virtualization enables organisations to segment different virtual networks within a single physical network or to connect devices on different physical networks to create a single virtual network.

The global Software Defined Networking Market was valued at US$ 5,690.1 Mn in 2019 and is estimated to reach US$ 26,3331.2 Mn by 2027 exhibiting a CAGR of 61.5% between 2020 and 2027.

A software defined network provides visibility across the whole network, giving security threats a more complete picture. With the increase of internet-connected smart devices, SDN offers a number of advantages over conventional networking. In order to prevent compromised devices from infecting the rest of the network, operators can immediately quarantine infected devices or create separate zones for devices that need varying levels of security. A controller that enables centralised management and control, automation, and policy enforcement across physical and virtual network environments is the key component of an SDN architecture.

APIs that convey information from the controller to the various network devices in a southbound fashion (such as switches, access points, routers, and firewalls). The controller and the applications and policy engines, to which an SDN appears as a single logical network device, communicate with one another via northbound APIs. Functional segregation, network virtualization, and automation through programmability are only a few of the technologies that SDN incorporates.

The initial objective of SDN technology was primarily the division of the network control plane and data plane. The data plane transports packets from one location to another while the control plane decides how they should move through the network. An arriving packet finds its way to a network switch in a typical SDN environment. The switch's proprietary firmware contains rules that instruct it where to go. A switch sends a route request to a controller for a packet that lacks a specific route in software-defined networking's so-called adaptive or dynamic operation mode. Adaptive routing, which does not use a controller and instead issues route requests through routers and algorithms based on the network topology, is distinct from this process.

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