MPLS VPN (Multiprotocol Label Switching Virtual Private Network) is a special type of virtual private network that uses multiprotocol label switching technology to create a private network over a public infrastructure, such as the internet. It allows remote offices and employees to securely access the company network, resources, and data as if they were on-site, with the added benefit of improved network performance, security, and scalability compared to traditional VPNs. Understanding and managing MPLS VPN requires specialized skill in network engineering, configuration, and troubleshooting.

Multiprotocol Label Switching (MPLS) is a network protocol used to speed up and prioritize network traffic. It involves labeling packets to direct them through the most efficient route, thereby minimizing delays and improving overall network performance. However, implementing and managing MPLS can be complex, making it a specialized skill that requires expertise in networking, routing, and protocols.

Overlay Transport Virtualization refers to a network architecture that enables the creation of virtualized transport networks over existing physical infrastructure. This skill involves the use of encapsulation techniques to separate data traffic from the underlying hardware, allowing for improved scalability, flexibility, and resource utilization. Knowledge of Overlay Transport Virtualization is applied to enhance network performance, facilitate multi-tenancy, and simplify network management by enabling the dynamic allocation of resources and services across diverse environments.

Riverbed (Software) refers to a suite of software tools used for network performance monitoring, application visibility, and digital experience analysis. It is applied in work settings to identify connectivity issues, track system behavior, and support troubleshooting across distributed environments. The skill involves configuring, interpreting, and reporting on performance data to help maintain reliable network and application service.

Software-Defined Networking Wide Area Network (SD-WAN) is a technology that abstracts network control and enables centralized management of network resources. It dynamically optimizes traffic routing across multiple network paths, including MPLS, broadband, and LTE, based on application requirements and network conditions. SD-WAN enhances network agility, performance, and security while reducing costs associated with traditional WAN deployments.