CompTIA Network+ N10-009 Practice Question

VXLAN is the correct answer as it enables the creation of a large number of virtualized Layer 2 networks over a physical Layer 3 network. This capability is highly suitable for DCI applications because it allows for extensive scalability and efficient traffic management necessary for interconnected data centers, supporting high-volume traffic demands. In contrast, GRE provides tunneling capabilities without inherent scaling or segmentation features, making it less ideal for complex DCI. L2TPv3 focuses on Layer 2 tunneling over IP networks for VPN services and does not specifically target the high scalability demands of DCI like VXLAN does.