Dynamic DNS configuration Guide
What is Dynamic DNS (DDNS)?
DNS stands for either Domain Name System or Domain Name Server. DNS used for name resolution between server hostname and IP Address. Many times there will be a change in system hostname or IP for some reason. During this time all DNS zone entries must be updated manually. Also accuracy of changes implemented to be considered. Think what happens if you have 500+ machines. Keeping them up-to-date by tracking manually is hectic.