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The other computers get no group policies, so you can forget about any carefully-orchestrated centralized management scheme. Imagine what would happen if you asked your users to type Fully Qualified Domain Names (FQDNs) rather than simple flat names to connect to internal servers. Users are willing to type com to buy a used wristwatch, but they don’t want to type \w2k3s102school.edu\ freshman_zclass to map a drive. The domain to which the desktop or server belongs has a DNS name as well as a flat name.
DNS servers, however, stubbornly insist that every query specify a target domain. You can see this suffix in the Properties of the local system (Figure 1).
Some examples of such these changes are updating the IP address of a server, updating your MX record to host your email at a new location, or adding a new website.
The TTL setting tells the Internet how long to wait before returning to check your DNS record for potential new information.
You’re so pleased with the ease of the upgrade that you forget to reconfigure the TCP/IP settings of the newly upgraded DC to point at itself for DNS. (If you’ve installed the Support Tools, you can run Netdiag /fix.) Now change the DHCP scope option to point clients at the new DC for DNS, then chase down any statically mapped servers and desktops and correct their DNS entries.
If you do give it a value, the resolver first tries the Primary Suffix, then the Connection-specific Suffix, then the parent suffixes of the Primary Suffix.
The TCP/IP settings for all network interfaces share an optional set of DNS suffixes that the Registry calls a Search List.
Well over 70 percent of all support calls that come to Microsoft support services that start out as Active Directory or Exchange calls end up being DNS calls.
Yet, as you’ll see in this article, most of these issues don’t require extensive diagnostic work or sophisticated tools to isolate and resolve.
TTL stands for “Time to Live” and it refers to how long your DNS settings are supposed to be cached before they are automatically refreshed.