What is a key disadvantage of centralized deployments in Forescout?

The correct answer highlights a critical aspect of centralized deployments in ForeScout systems: the reliance on the WAN link for NAC (Network Access Control) functionality. In a centralized setup, all control and management functions are typically handled at a single (or few) central location(s). This means that if the WAN connection between the centralized deployment and remote locations is interrupted or experiences high latency, the ability to enforce and manage network access policies can be severely impacted. This situation creates a dependency on the connectivity to the central management, which poses a significant risk to NAC availability in scenarios where reliable and continuous network access is crucial.

Understanding this disadvantage is vital in designing network security architectures, as it can lead to downtime or delays in remediation efforts at remote sites, affecting the overall security posture of the organization. Other options may point to various characteristics of different deployment approaches, but they do not directly capture this key vulnerability associated with centralization in NAC systems.