CIM sessions are created using the New-CimSession command. The following example creates a CIM session using the current system as the computer name using WSMan as the protocol:

PS> New-CimSession -ComputerName $env:COMPUTERNAME

Id           : 1
Name         : CimSession1
InstanceId   : bc03b547-1051-4af1-a41d-4d16b0ec0402
ComputerName : PSTEST
Protocol     : WSMAN

If the computer name parameter is omitted, the protocol will be set to DCOM:

PS> New-CimSession

Id           : 2
Name         : CimSession2
InstanceId   : 804595f4-0144-4590-990a-92b2f22f894f
ComputerName : localhost
Protocol     : DCOM

New-CimSession can be used to configure operation timeout settings and whether or not an initial network test should be performed.

The protocol used by New-CimSession can be changed using New-CimSessionOption. Changing the protocol can be useful if there is a need to interact with systems where WinRM is not running or configured:

PS> New-CimSession -ComputerName $env:COMPUTERNAME -SessionOption (New-CimSessionOption -Protocol Dcom)

Id           : 3
Name         : CimSession3
InstanceId   : 29bba117-c899-4389-b874-5afe43962a1e
ComputerName : PSTEST
Protocol     : DCOM