What is the order of volatility in digital forensics?

The order of volatility determines the sequence for collecting digital evidence, starting with the most volatile data that will be lost first. From most to least volatile: CPU registers and cache, system memory or RAM, network state and routing tables, running processes, disk storage, remote logging and monitoring data, physical configuration and network topology, and archival media. Forensic investigators collect evidence in this order to preserve data before it disappears. RAM contents are lost when power is removed. Disk data persists but can be overwritten.