what is dynamic dns explain briefly?

if you mean dynamic update, it allows the clients in a domain to dynamically update their dns information (eg when a client gets a new ip via dhcp) theirs services like dyndns that offer that funtionality in the internet as well as dynamic dns

Hi Muppuri, Dynamic update enables DNS client computers to register and dynamically update their resource records with a DNS server whenever changes occur. This reduces the need for manual administration of zone records, especially for clients that frequently move or change locations and use DHCP to obtain an IP address. For more information about Dynamic update, please refer to: Dynamic update http://technet.microsoft.com/en-us/library/cc784052(WS.10).aspx Brent Hu, TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.