A MID Server needs to have access to the install.service-now.com domain to automatically stay up-to-date with instance versions. This domain hosts the MID Server upgrade files that are downloaded and installed by the MID Server when a new version is available. The MID Server checks for updates every 24 hours by default, or when the mid.upgrade.check_interval property is set12.
:
1: ServiceNow Discovery Documentation, MID Server Upgrade section
2: ServiceNow Support Article, Connections to allow list for the MID Server

The vCenter Event Collector is a MID Server extension that listens for vCenter-related events and updates the CMDB accordingly. The event collector allowsthe CMDB to be updated with changes to virtual machines (VMs), in addition to the updates detected by Discovery1.
:
3: Product Documentation | ServiceNow
Reference: https://docs.servicenow.com/bundle/quebec-servicenow-platform/page/product/mid-server/ concept/c_VCenterEventProcessorExtension.html

Reconciliation rules are used to determine which data sources can update CI attributes in ServiceNow.
Reconciliation rules can be static or dynamic, and they can be applied to specific CI classes, attributes, or discovery sources. Reconciliation rules can also specify the actions to take when there are unmatched values, such as removing, ignoring, or updating them1.
:
1: Reconciliation rules - Product Documentation: San Diego - Now Support Portal Reference: https://docs.servicenow.com/bundle/orlando-servicenow-platform/page/product/configuration- management/task/t_DefineDataSourcePrecedence.html

The image shows a part of a horizontal pattern in Pattern Designer that uses the WMI Query operation to retrieve information about the processes running on a Windows server. The operation takes a WQL query as an input parameter and returns a tabular variable that contains the results of the query. The tabular variable is named 'WMI Query' by default, but it can be renamed by the user. The WQL query in the image selects four attributes from the Win32_Process class: Name, MaximumWorkingSetSize, PageFaults, and PeakVirtualSize.
These attributes are stored as scalar variables in the tabular variable, and they can be accessed by using the dot notation, such as WMI Query.Name or WMI Query.MaximumWorkingSetSize. Therefore, the most probable results of the image are a tabular variable named 'WMI Query' and two scalar variables named
'MaximumWorkingSetSize' and 'PeakVirtualSize'.
:
Pattern Designer | WMI Query
Win32_Process class
WQL (SQL for WMI)

In the context of ServiceNow Discovery patterns, the types of temporary variables include Scalar/List and Tabular/Table. Scalar/List variables are used to store single values or lists of values, while Tabular/Table variables are used to store structured data in a table format. Command and SQL statement are not types of temporary variables; rather, they are types of operations or steps that can be used within a pattern to execute commands or SQL queries. References = ServiceNow Discovery documentation, especially sections related to Discovery Patterns and the use of temporary variables within patterns.