The document discusses Active Directory tools and files. The NTDS.dit file contains all Active Directory partitions and objects on a domain controller by default located in the systemroot\NTDS folder. Transaction logs (EDB.log) and checkpoint files (EDB.chk) record changes made to the Active Directory database. Reserved transaction log files (ebdres00001.jrs, ebdres00002.jrs) are also used to support Active Directory.