What does this PowerShell command do: Get-Service *spool* | Restart-Service

What does this PowerShell command do: Get-Service *spool* | Restart-Service

• Restarts any service that has "spool" in its name
• Restarts the print spooler on the computer [No Custom Service This would be correct]
• Restarts all services on the computer
• Restarts the print spooler on the print server 

EXPLANATION

PS C:\Windows\system32> Get-Service *spool*

Status   Name               DisplayName
------   ----               -----------
Running  Spooler            Print Spooler
 

PS C:\Windows\system32> Get-Service *spool* | Restart-Service