Trim resolve-dnsname results

Question

 
 I am trying to write a script to validate that the forward and reverse lookup of a IP match. With multiple DNS zones I may have multiple periods in the FQDN so the code I have below does not work all the time.  For example split -3 will give me
the shortname server1 if the FQDN server1.domain.local.  However if the FQDN is server1.sub.domain.local the result would be blank.
My question would be how do I take the result that is left of the first period set it as a variable, then also variable for everything to the right of the first period?
$shortname = resolve-dnsname 192.168.0.1 | %{$_.NameHost} | ForEach-Object{$_.Split(".")[-3]}
Write-Host $shortname$longname = resolve-dnsname 192.168.0.1 | %{$_.NameHost} | ???????

Answer 1

$_.split(".",2)[1]
The ,2 just splits the string into 2 parts at the first "."  
[1] picks the 2nd part of that split.
This should work:
$DNSname = (resolve-dnsname 192.168.0.1).NameHost.split(".",2)
$ShortName = $DNSname[0]
$LongName = $DNSname[1]