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Fully Qualified Domain Names (FQDN)1:57 with Jason Seifer
A fully qualified domain name (FQDN) specifies the name's exact location in DNS.
There could be several entries for "www" when looking up a domain which is why the FQDN exists. The FQDN refers to a whole domain name and ends with a dot (.) like the CNAME.
A lot of the time when you're working with DNS, you need to refer to the full domain name.
Now there's a shortcut for this called the FQDN or fully qualified domain name.
The fully qualified domain name specifies the exact location in DNS.
An example of this is, let's say you had www.example.com.
When you're talking about just the subdomain, WWW, well there are a ton of those on the Internet.
Using the fully qualified domain name, you would actually specify www.example.com
which would refer to the full domain name.
When you use the fully qualified domain name, it ends with a dot just like the CNAME.
So now let's go ahead and add a CNAME record, and we'll see what that looks like.
Again I'm using the DNS simple web interface, and this is just an example of the kinds of formatting.
These are not live entries for teamtreehouse.com.
We're using this only as examples.
So click add record and CNAME.
Now you can use wildcard records here, so what we would do in this case is let's say we want nick.teamtreehouse.com
to resolve to jason.teamtreehouse.com.
Maybe we're doing something weird that day.
So we'll say nick.teamtreehouse.com is an alias to jason.teamtreehouse.com,
and then we can click TTL of 1 hour and hit add record.
That's something again that we could do for a wildcard domain—*.nick.team—actually we don't need the .teamtreehouse.com—
alias for jason.teamtreehouse.com.
We can even put a dot there if we want to have the fully qualified domain name hooked up.
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