Which management platform helps strengthen security posture by enabling uniform policy deployment, uncovering and remediating unplanned changes, and extends protection to the application layer?

Firepower Management Center provides centralized policy deployment across multiple Cisco Firepower NGFW devices, ensuring uniform security posture at scale. It includes compliance monitoring that identifies and helps remediate unplanned or unauthorized configuration changes. FMC also enables deep packet inspection and application-aware policies that extend protection beyond ports and protocols to the application layer.

Cisco Defense Orchestrator is a cloud-based management tool focused on simplifying policy consistency across diverse Cisco devices, but it does not specifically emphasize unplanned change detection and remediation or native application-layer enforcement in the way described.

Firepower Policy Manager is not an actual standalone Cisco product - this is a fabricated option.

Firepower Device Manager is a lightweight, on-box management interface for a single Firepower device and lacks the centralized multi-device management, compliance, and change detection capabilities described in the question.