Which of the following does NetFlow use to determine if traffic belongs to the same flow? (Select three.)

NetFlow identifies and categorizes traffic flows based on specific attributes to determine whether packets belong to the same flow. Among these attributes, port numbers play a critical role in this process.

When NetFlow is monitoring network traffic, it can use both source and destination port numbers to differentiate between various applications and services running on devices. This means that traffic directed to different services on the same IP address can be treated as separate flows if they have different port numbers.

In addition to port numbers, the correct attributes include the IP address, which is essential for identifying the source and destination devices involved in the communication. Each unique combination of IP addresses, along with the associated port numbers, helps to accurately delineate between different flows.

The interface name, while relevant to identify the direction of traffic on a particular interface, does not contribute to the determination of flow uniqueness in the same way that IP addresses and port numbers do. Similarly, the MAC address pertains to a different layer of the networking model and is not used in the context of flow identification since flows are primarily defined at the transport and network layers.

Therefore, the combination of port numbers and IP addresses is instrumental in classifying traffic and maintaining the integrity of flow tracking in NetFlow.