FMCSA DOT Acronyms – “V” V VIN – Vehicle Identification Number VPN / IPSec– Virtual Private Network / Internet Protocol Security Related posts: FMCSA DOT Acronyms – “I” FMCSA DOT Acronyms – “P” FMCSA DOT Acronyms – “T” FMCSA DOT Acronyms – “A”