Gets the vendor for macAddress from "api.macvendors.com"

Get-VendorFromMacAddress.ps1

Function Get-VendorFromMacAddress
{
    [CmdletBinding()]

    Param
    (
        [Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][string] $macAddress
    )

    Begin
    {
        Write-Verbose -Message ('Starting {0} with {1} parameterset' -f $MyInvocation.InvocationName, $PsCmdlet.ParameterSetName)
    }

    Process
    {
        try
        {
          $vendor = (Invoke-WebRequest -UseBasicParsing -Uri ("https://api.macvendors.com/" + $macAddress)).Content
        }
        catch
        {
          $vendor = 'UNKNOWN VENDOR'
        }
        
        return $vendor
    }

    End
    {
        Write-Verbose -Message ('Ending {0}' -f $MyInvocation.InvocationName)
    }
}