The benefit of using a software-defined network (SDN) lies in its ability to centralize control over the network infrastructure through software-based applications. This allows for greater flexibility and scalability, enabling rapid adjustments to network configurations without needing physical hardware changes. Additionally, SDNs can enhance security by offering improved monitoring and control over data traffic, making it easier to detect and mitigate threats. Overall, SDNs are highly adaptable and can optimize network performance, leading to reduced operational costs and improved service delivery.