On TCP/IP networks, the Domain Name System (DNS) is used to resolve host names into IP addresses.
With DNS, records must be created manually for every host name and IP address. Starting with Windows 2000, Microsoft enabled support for Dynamic DNS, a DNS database which allows authenticated hosts to automatically add a record of their host name and IP address, eliminating the need for manual creation of records.
Note: Disable DDNS if the SMB3 Continuous Availability feature is in use on the server.