The Address (A) record associates a domain name or subdomain with an IP address, which is the primary purpose of the DNS system. The @ sign identifies "this domain;" for example, A @ nnn.nnn.nnn ...
After you change DNS records for a domain name ... Click the Windows “Start” button, type “cmd” in the Search field and press “Enter” key to open a command prompt window.
Aging is a feature that allows identifying stale DNS records. It actually uses two intervals and a DNS record is considered as stale once both are elapsed. These intervals are: Non-Refresh ...
Go to the DNS server, click Start, and go to the Start Search. There, type Regedit, hit the Enter button, and navigate to the Console tree. There, expand the following key: HKEY_LOCAL_MACHINE ...