SD-WAN Explained

Introduction to SD-WAN

SD-WAN (Software-Defined Wide Area Network) is a virtual network managed through software. This approach provides greater control over how data is routed and prioritized because the network is abstracted away from the physical hardware. As a result, IT teams can manage connectivity more flexibly and efficiently.

Overlays and Underlays

SD-WAN functions as an overlay, which is a virtualized network built on top of a physical layer known as the underlay. The underlay consists of the physical infrastructure, including modems, internet circuits, and connectivity cables, on which the SD-WAN is built.

Benefits of SD-WAN

Because SD-WAN is a software-defined overlay, it offers flexible services that can adapt to the changing connectivity and capacity needs of endpoints and applications. Organizations benefit from improved performance, scalability, reliability, and security. Additionally, SD-WAN is more cost-effective due to reduced transport costs, the consolidation of network devices, and enhanced operational efficiency.

Core Capabilities of SD-WAN

The core capabilities of SD-WAN include support for multiple connection types, such as MPLS (Multiprotocol Label Switching) and internet circuits via fiber optic, copper, high-speed cellular, or satellite networks. It also provides encryption for WAN connections to ensure data security and privacy. Furthermore, SD-WAN features network intelligence that maintains constant awareness of applications and traffic patterns, enabling dynamic traffic control and routing to optimize application performance and quality of service (QoS). This prioritization ensures that business-critical applications receive the necessary resources, leading to increased user satisfaction. Lastly, SD-WAN offers central management, allowing for quick and easy network configuration and the enforcement of consistent policies across the entire network.

Introduction to SASE

SASE (Secure Access Service Edge) is a technology that delivers WAN and security controls as a cloud service close to the edge of the network. It is also referred to as zero trust edge or ZTE.