A network administrator is looking for a solution to extend Layer 2 capabilities and replicate backups between sites. Which of the following is the best solution?

Security Service Edge focuses on delivering security functionalities and policies at the network edge, integrating security services with networking capabilities. While it enhances security for data in transit, it does not provide the Layer 2 connectivity required for replicating backups between sites, making it unsuitable for this specific need.

Infrastructure as code (IaC) is a practice that involves managing and provisioning computing infrastructure through code rather than manual processes. While IaC improves automation and consistency in managing infrastructure, it does not address the need for Layer 2 connectivity or the replication of backups across sites.

Zero Trust architecture is a security framework that mandates strict identity verification for every person and device attempting to access resources on a network, regardless of whether they are inside or outside the network perimeter. Although it enhances security, it does not facilitate Layer 2 connectivity, which is crucial for the backup replication needed in this scenario.