Overlay Networking
Overlay networking is a network virtualization technique that creates a logical network on top of an existing physical network infrastructure. It enables the abstraction of network topology, allowing virtual networks to be deployed independently of the underlying physical hardware. This is commonly used in cloud computing, container orchestration, and software-defined networking (SDN) to provide flexible, scalable, and isolated network environments.
Developers should learn overlay networking when working with distributed systems, microservices, or containerized applications, as it facilitates seamless communication across different hosts or data centers. It is essential for scenarios like multi-cloud deployments, network segmentation for security, and dynamic scaling in platforms like Kubernetes, where pods need to communicate regardless of their physical location.