1. $tested_computers = @()
  2. foreach ($computer in (Get-ADComputer -Filter '*' | Select -Expand Name))
  3. {
  4.     if($computer -and (Test-Connection -Cn $computer -BufferSize 16 -Count 1 -ea 0 -quiet))
  5.     {
  6.         $tested_computers += $computer
  7.     }
  8. }
  9.  
  10. Get-WmiObject -ComputerName $tested_computers -Class Win32_NetworkAdapter | `
  11. Where-Object { $_.Speed -ne $null -and $_.MACAddress -ne $null } | `
  12. Format-Table -Property SystemName,Name,NetConnectionID,Speed