Netflow Traffic Analysis

Three Elements of Netflow Traffic Flows

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What are the three things that the Netflow uses to consider the traffic to be in a same flow?

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NetFlow is a network protocol that collects and analyzes network traffic data. It is used to identify network traffic patterns, monitor network usage, and troubleshoot network issues. NetFlow records information about network traffic flows and exports this information to a collector for analysis.

NetFlow uses the following three things to consider the traffic to be in the same flow:

  1. IP address: The source and destination IP addresses of the packets are used to identify flows. NetFlow groups packets with the same source and destination IP addresses together into a single flow.

  2. Port numbers: The source and destination port numbers of the packets are used to identify flows. NetFlow groups packets with the same source and destination port numbers together into a single flow.

  3. L3 protocol type: The Layer 3 protocol type of the packets is used to identify flows. NetFlow groups packets with the same Layer 3 protocol type together into a single flow.

The interface name and MAC address are not used by NetFlow to identify flows. The interface name is used to identify the physical interface on the router or switch, while the MAC address is used to identify the source and destination devices. However, NetFlow does record the MAC addresses of the source and destination devices in the flow records it generates.

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