CDLIS consists of a Central Site (located in Ashburn, Virginia) and nodes for all 51 SDLAs, all interconnected on AAMVAnet (AAMVA's proprietary, secure network).
When a jurisdiction SDLA queries the CDLIS Central Site via AAMVAnet to obtain information about an applicant prior to issuing a CDL, the CDLIS Central Site compares data provided by the State Of Inquiry (SOI) against all MPRs at the Central Site.