Cisco Certified Network Associate (CCNA) 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer is flow monitor. A flow monitor is a component in Cisco's NetFlow that allows you to collect and analyze IP traffic flows that pass through an interface. By attaching a flow monitor to a specific interface, you can track and measure various metrics associated with IPv4 traffic, such as source and destination IP addresses, protocols, and the volume of data transferred.

Flow monitors work in conjunction with other NetFlow components, allowing you to define specific data collection criteria and output the flow data for analysis. This capability is essential for network monitoring, performance analysis, and troubleshooting, providing insights into network usage and behavior.

The other components have different roles in the context of NetFlow. Flow controllers typically manage the overall function of flow processing but are not directly involved in the tracking of traffic. Flow samplers are used to create a sample of the traffic rather than capturing all traffic flows. Flow analyzers focus on the analysis of the collected flow data instead of the actual monitoring of traffic on an interface.