BPF program

Formerly called Berkeley Packet Filter

BPF program: “A kernel-mode program running in the BPF1) execution environment.” (SysPrfBGrg 2021)

Berkeley Packet Filter

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1)
1 BPF originally stood for Berkeley Packet Filter, but the technology today has so little to do with Berkeley, packets, or filtering that BPF has become a name in itself rather than an acronym.