SNMP (Simple Network Management Protocol): Although not specifically a flow monitoring protocol, SNMP is widely used for network management and monitoring.It offers visibility into both Layer 2 (Data Link Layer) and Layer 3 (Network Layer) traffic data. sFlow samples packets at specified intervals, providing a scalable and resource-efficient method for monitoring high-speed networks. Unlike NetFlow, which is flow-based, sFlow uses a statistical sampling approach to collect data from network devices. sFlow (Sampled Flow): sFlow is another network traffic monitoring protocol, developed by InMon Corporation.IPFIX extends the functionality of NetFlow and enables greater interoperability between different networking devices and collectors. It is based on NetFlow v9 and offers a more open, vendor-neutral solution for flow data collection and analysis. IPFIX (IP Flow Information Export): IPFIX is a standard for exporting flow information, developed by the Internet Engineering Task Force (IETF).Version 9, also known as Flexible NetFlow, offers a more extensible and customizable format, allowing administrators to define their own flow records and templates. Version 5 is widely implemented and provides basic flow information. NetFlow Versions: There are several versions of NetFlow, with the most commonly used being v5 and v9. NetFlow data can be used for various purposes, including bandwidth monitoring, network troubleshooting, detecting security threats, and capacity planning. A flow is defined by a set of unique attributes, such as source IP address, destination IP address, source port, destination port, protocol, and other information. It works by exporting data records about each flow, which are then analyzed by a collector or analyzer tool.
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