function Test-OpenPorts
{
	<#
	.SYNOPSIS
		A brief description of the Test-OpenPorts function.

	.DESCRIPTION
		A detailed description of the Test-OpenPorts function.

	.PARAMETER ComputerName
		A description of the ComputerName parameter.

	.PARAMETER Ports
		A description of the Ports parameter.

	.EXAMPLE
		PS C:\> Test-OpenPorts -ComputerName 'COMPUTERONE' -Ports 3389
		This will test COMPUTERONE to see if port 3389 is open.

	.EXAMPLE
		PS C:\> $Computers = Get-ADComputer -Filter { Name -like '*CRTP*' }
		foreach ($Computer in $Computers) {
			​Test-OpenPorts -ComputerName $Computer -Ports 80,443,445,3389,5985 | Format-Table -AutoSize
		}
		This will test all computers in the AD search scope to see if port 80, 443, 445, 3389, and 5985 are open.

	.EXAMPLE
		​PS C:\> Test-OpenPorts -ComputerName 'COMPUTERONE' -Ports 21,80,443,445,3389,5985 | Format-Table -AutoSize
		This will test COMPUTERONE to see if port 21, 80, 443, 445, 3389, and 5985 are open.

	.EXAMPLE
		​PS C:\> Test-OpenPorts -ComputerName 'COMPUTERONE' -Ports 1,3,7,9,13,17,19,21,22,23,25,24,26,37,53,79,80,81,82,88,100,106,110,111,113,119,135,139,143,144,179,199,254,255,280,311,389,427,443,444,445,464,465,497,513,514,515,543,544,548,554,587,593,625,631,636,646,787,808,873,902,990,993,995,1000,1022,1024,1025,1026,1027,1028,1029,1030,1031,1032,1033,1035,1036,1037,1038,1039,1040,1041,1044,1048,1049,1050,1053,1054,1056,1058,1059,1064,1065,1066,1069,1071,1074,1080,1110,1234,1433,1494,1521,1720,1723,1755,1761,1801,1900,1935,1998,2000,2001,2002,2003,2005,2049,2103,2105,2107,2121,2161,2301,2383,2401,2601,2717,2869,2967,3000,3001,3128,3268,3306,3389,3689,3690,3703,3986,4000,4001,4045,4899,5000,5001,5003,5009,5050,5051,5060,5101,5120,5190,5357,5432,5555,5631,5666,5800,5900,5901,6000,6002,6004,6112,6646,6666,7000,7070,7937,7938,8000,8002,8008,8009,8010,8031,8080,8081,8443,8888,9000,9001,9090,9100,9102,9999,10000,10001,10010,32768,32771,49152,49153,49154,49155,49156,49157,50000
		This will test COMPUTERONE to see if any of the top 200 ports are open.

	.EXAMPLE
		​PS C:\> Test-OpenPorts -ComputerName 'COMPUTERONE' -Ports 21,22,23,25,53,80,110,111,135,139,143,443,445,993,995,1723,3306,3389,5900,8080
		This will test COMPUTERONE to see if any of the top 20 ports are open.
	.OUTPUTS
		System.String, Default

	.NOTES
		Additional information about the function.
	#>

	[CmdletBinding(DefaultParameterSetName = 'Default',
				   HelpUri = 'https://github.com/BanterBoy')]
	[OutputType([string])]
	param
	(
		[Parameter(ParameterSetName = 'Default',
				   Mandatory = $true,
				   ValueFromPipeline = $true,
				   ValueFromPipelineByPropertyName = $true,
				   HelpMessage = 'Enter computer name or pipe input')]
		[Alias('cn')]
		[string[]]$ComputerName,
		[Parameter(ParameterSetName = 'Default',
				   Mandatory = $true,
				   ValueFromPipeline = $true,
				   ValueFromPipelineByPropertyName = $true,
				   HelpMessage = 'Enter port number or pipe input')]
		[Alias('pt')]
		[int[]]$Ports
	)

	BEGIN
	{
	}
	PROCESS
	{
		foreach ($Computer in $ComputerName)
		{
			foreach ($Port in $Ports)
			{
				Test-NetConnection -ComputerName $Computer -Port $Port
			}
		}
	}
	END
	{
	}
}