Which security solution uses NetFlow to provide visibility across the network, data center, branch offices, and cloud?

Cisco CTA (Cognitive Threat Analytics) is a cloud-based threat detection service that analyzes web proxy logs, not primarily NetFlow, to detect malware.

Cisco Secure Network Analytics, which evolved from Cisco Stealthwatch, is specifically designed to collect and analyze NetFlow (or IPFIX) data from various network devices to provide deep visibility into network traffic patterns. This extensive data allows it to detect anomalies, threats, and policy violations across physical, virtual, and cloud environments.

Cisco Encrypted Traffic Analytics (ETA) is a feature within various Cisco platforms that uses NetFlow data to analyze encrypted traffic for threats without decryption, but it's a feature, not the overarching visibility solution described.

Cisco Umbrella provides DNS-layer security and Secure Web Gateway functionality, but its primary function is not comprehensive NetFlow-based network visibility.