What is the difference between "No address associated with name" and "Unknown host"

[Nagy László Zsolt]

>
> If you have the "dig" command available on your machine, you can read 
> its documentation, and play with it. It will make things clear. Look 
> below: in the first case, there is no A record, but there is a SOA 
> record. However, the hostname of the SOA is different from the queried 
> hostname. In the second case, there is no A record, there is a SOA and 
> the hostname of the SOA and the queried hostname are the same. So in 
> the first case, we cannot know if the host is registered at all. In 
> the second case, the hostname is registered for sure, but it has no A 
> record. (However, subdomains like www.eirtrade.ie can have A records...)
>
> #dig accounts.eirtrade.ie
Sorry, try this with accounts.eirtrade.i instead of 
accounts.eirtrade.ie. :-)