101examples.ps1

$file = 'C:\etc\srv03sb.csv'
$computers = Import-Csv -Path $file -Header ComputerName, IPAdress, DNSServer1, DNSServer2, DNSServer3 
foreach ($computer in $computers) {
    if(Test-Connection -ComputerName $computer.ComputerName -Count 1 -ea 0) {            
        try {            
            $Networks = Get-WmiObject Win32_NetworkAdapterConfiguration -ComputerName $computer.ComputerName -EA Stop | ? {$_.IPEnabled}
		}
		catch {            
            Write-Warning "Error occurred while querying $computer."            
            Continue            
        } 
        foreach ($Network in $Networks) {            
                $dns = @($computer.DNSServer1,$computer.DNSServer2)
                $Network.SetDNSServerSearchOrder($dns) | Out-Null
        }          
    }
}