A backup domain controller (BDC) is a role a Windows NT computer takes on to help manage access to network resources.
Disjoint namespace is an occurrence in Active Directory when a member computer with one Domain Name Service (DNS) primary suffix does not have the same DNS domain name as the domain of which the computers are members.
Ntdsutil.exe is a command-line tool for accessing and managing a Windows Active Directory database.
A read-only domain controller (RODC) is a domain controller that hosts an Active Directory database's read-only partitions.
A serial port server, also called a serial server or port redirector, is a device that transfers data between a computer serial port (COM port) and an Ethernet local area network (LAN).