Network virtualization is the process of creating virtual versions of network resources, such as routers and switches, to improve scalability and flexibility.

It creates a virtual version of a network that functions like a real network. It enables multiple virtual networks to run on a single physical network infrastructure, providing network isolation, security, and flexibility. Network virtualization is achieved through software, such as virtual network functions (VNFs) and network functions virtualization (NFV), and allows multiple virtual networks to run on a single physical network infrastructure.