Which technology provides an overlay fabric to connect remote locations utilizing commodity data paths and improves network performance, boosts security, and reduces costs?

InfiniBand is a high-bandwidth, low-latency communication technology primarily used in high-performance computing and data center server clusters, not for connecting remote WAN locations.

VTEP (VXLAN Tunnel Endpoint) is a specific component within a VXLAN overlay network responsible for VXLAN encapsulation and de-encapsulation, mainly used within data centers, not the overarching solution for global remote connectivity.

SD-WAN (Software-Defined Wide Area Network) is a technology that creates an intelligent, software-defined overlay network over various underlying transport services (e.g., broadband, MPLS, LTE). This abstraction allows for centralized control, optimized application performance, enhanced security policies, and cost savings by leveraging readily available internet connections to connect geographically dispersed sites efficiently.

VXLAN (Virtual Extensible LAN) is an encapsulation protocol that extends Layer 2 domains over Layer 3 networks, primarily used in data centers, and is a foundational technology rather than the complete solution for WAN optimization and security as described.