A company runs mission-critical infrastructure in a single data center. Due to business growth, it plans to open more data centers in the coming years. A network engineer is asked to recommend a netwo

TrustSec is a security framework focused on policy-based access control and network segmentation, not a data center interconnect technology for extending Layer 2 and VM mobility.

OTV (Overlay Transport Virtualization) is a Cisco data center interconnect technology that extends Layer 2 networks over an IP network, enabling seamless VM mobility between data centers without complex reconfigurations. It offers control plane separation for fault isolation, supports scalability, and can incorporate security features like encryption, meeting all the specified requirements for robust DCI.

CloudSec is a security technology for encrypting traffic between data centers or to cloud services, typically operating at Layer 2 (MACsec over IP) or Layer 3, but it's not a Layer 2 extension technology like OTV for VM mobility.

UDLD (UniDirectional Link Detection) is a Layer 2 protocol used to detect and disable unidirectional links to prevent network loops, and it is not a data center interconnect technology.