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Powershell/Scripts/check-dns-resolution.ps1

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+<#
+.SYNTAX       check-dns-resolution.ps1
+.DESCRIPTION  checks the DNS resolution with frequently used domain names
+.LINK         https://github.com/fleschutz/PowerShell
+.NOTES        Author: Markus Fleschutz / License: CC0
+#>
+ 
+try {
+	$StopWatch = [system.diagnostics.stopwatch]::startNew()
+	write-progress "Reading Data/domain-names.csv..."
+
+	$PathToRepo = "$PSScriptRoot/.."
+	$Table = import-csv "$PathToRepo/Data/domain-names.csv"
+
+	foreach($Row in $Table) {
+		write-progress "Resolving $($Row.Domain) ..."
+		if ($IsLinux) {
+			$Ignore = nslookup $Row.Domain
+		} else {
+			$Ignore = resolve-dnsName $Row.Domain
+		}
+	}
+	$Count = $Table.Length
+
+	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
+	$Average = [math]::round($Count / $Elapsed, 1)
+	"✔️ $Average domains/s ($Count domains resolved in $Elapsed sec)"
+	exit 0
+} catch {
+	write-error "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}