Which technology offers the best solution for linking multiple data centers to enable them to operate cohesively, with support for high-volume traffic and extensive scalability?
Generic Routing Encapsulation (GRE)
Layer 2 Tunneling Protocol Version 3 (L2TPv3)
Internet Protocol Security (IPSec)
VXLAN
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.
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