what is the diference?

[Chris Buxton]

At 4:00 PM +0300 5/31/01, vex wrote:
>what exactly are the diference in:
>--
>hostname1	IN	A	1.1.1.1
>hostname2	IN	A	1.1.1.1
>--
>and
>--
>hostname1	IN	A	1.1.1.1
>hostname2	IN	CNAME	hostname1
>--
>
>what is the right way to do this, with A or CNAME?

The effective difference is nil, assuming you have no other records 
(of any type) named hostname1 or hostname2.

A CNAME record can't have the same name as any other record. There 
are other restrictions on CNAME records, as well.

The alias created by a CNAME record gets all properties of the 
original (or canonical) name. This means that the alias is assigned 
all A, MX, HINFO, or other records of the original - even NS records, 
if applicable, though this result is ignored.


>or in this:
>
>--
>hostname1	IN	A	1.1.1.1
>--
>and
>--
>hostname1	A	1.1.1.1
>--
>
>what mean IN in this?

IN stands for Internet. Every record has a name, a TTL, a class, a 
type, and a data section; some of these can be omitted in certain 
circumstances. The default record class is IN, so unless you're 
mixing in some other class, IN can always be omitted.
____________________________________________________________________

Chris Buxton <cbuxton at menandmice.com>

Men & Mice <http://www.menandmice.com/> provides:
  - DNS training, including Active Directory
  - QuickDNS, a DNS management system for servers on Linux & Mac OS
    (Solaris support coming soon!)
  - DNS Expert, a DNS analysis and troubleshooting utility
____________________________________________________________________