SD-WAN
SD-WAN is one of the most widely applied SDN concepts implemented to address obstacles in conventional enterprise WAN infrastructures such as packet congestion or loss. By replacing MPLS (Multi-Protocol Label Switching) with software-defined network components, SD-WAN help enterprises simplify WAN setup for branch offices, SME setting, head office and data centers by virtualization. In short, the WAN management is shifted to the software-defined cloud. An intelligently capable SD-WAN shall support multiple connection types and network services including VPN, firewalls, WAN optimization and application delivery.
SD-Security
SD-Security is a software-defined architecture where security-oriented VNFs and policies are implemented on gateway devices. Protection and policy compliance are built by software approaches, while the reliance on proprietary hardware is minimized. SD-Security enables a more adaptive, agile and scalable security infrastructure by using programmable open source software policies and open-standard vCPE appliances, simplifying the deployment processes in branch offices and remote sites. For optimal SDN implementations, SD-Security should be accompanied with SD-WAN and an intelligent deployment of software-defined security architecture shall consist of mechanisms like zero-touch provisioning and automatic service chaining.