{"id":2951,"date":"2021-08-04T11:30:56","date_gmt":"2021-08-04T03:30:56","guid":{"rendered":"https:\/\/blog.spotodumps.com\/?p=2951"},"modified":"2021-08-03T15:12:33","modified_gmt":"2021-08-03T07:12:33","slug":"software-defined-networking-sdn","status":"publish","type":"post","link":"https:\/\/blog.spotodumps.com\/index.php\/2021\/08\/04\/software-defined-networking-sdn\/","title":{"rendered":"Software-Defined Networking (SDN)"},"content":{"rendered":"

What is software-defined networking (SDN)?<\/span><\/h2>\n

SDN<\/a><\/strong><\/em> is a networking paradigm that relies on software-based controllers or application programming interfaces (APIs) to communicate with the underlying hardware infrastructure and direct network traffic.<\/span><\/p>\n

This architecture is in contrast to traditional networks, which regulate network traffic via specialized hardware devices (i.e., routers and switches). Through software, SDN can establish and govern a virtual network \u2014 or traditional hardware.<\/span><\/p>\n

While network virtualization enables organizations to create multiple virtual networks within a single physical network or connect devices on different physical networks to create a single virtual network, software-defined networking introduces a new method of controlling data packet routing through a centralized server.<\/span><\/p>\n

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Why is software-defined networking necessary?<\/span><\/h2>\n

SDN is a significant advancement over traditional networking in that it permits the following:<\/strong><\/p>\n

Increased control with increased speed and flexibility:<\/span><\/strong>\u00a0Rather than manually programming various vendor-specific hardware devices, developers may program one open standard software-based controller to regulate traffic flow across a network. Additionally, network managers have more choice in terms of networking equipment, as they can use a single protocol to communicate with an unlimited number of hardware devices via a central controller.<\/span><\/p>\n

Customizable network infrastructure:<\/span><\/strong>\u00a0Admins can adjust network services and adapt the network architecture in real-time by configuring network services and resources from a single location using software-defined networking. This enables network administrators to optimize data flow via the network and prioritize critical applications.<\/span><\/p>\n

Robust security:<\/span><\/strong>\u00a0A software-defined network provides visibility across the entire network, providing a more holistic picture of security concerns. With the rise of internet-connected smart devices, SDN outperforms traditional networking. Operators can build distinct zones for devices that require varying levels of protection or quarantine compromised devices immediately to prevent them from infecting the rest of the network.<\/span><\/p>\n

The primary distinction between SDN and conventional networking is in the infrastructure: SDN is a software-defined networking technology, whereas traditional networking is hardware-based. SDN is far more versatile than traditional networking due to the software-based control plane. Providing administrators with centralized management over the network and the ability to change the configuration settings, provision resources, and enhance network capacity is made possible by the user interface.<\/span><\/p>\n

Additionally, there are security distinctions between SDN and traditional networking. SDN improves security in various ways due to increased visibility and the ability to build safe paths. However, because software-defined networks rely on a centralized controller, it is critical to secure the controller to maintain a secure network.<\/span><\/p>\n

How does software-defined networking (SDN) work?<\/span><\/h2>\n

Here are the fundamentals of SDN: SDN (as with anything virtualized) separates the software from the hardware. SDN separates the control plane, which selects where to transmit traffic, from the data plane, which forwards the traffic. This enables network managers who leverage software-defined networking to program and manage the entire network through a single pane of glass rather than device by device.<\/span><\/p>\n

A basic SDN architecture is composed of three components, each of which may be physically situated in a separate physical location:<\/span><\/p>\n