What part of Flow Designer allows for the encapsulation of integration capabilities with third-party systems?

The correct choice is IntegrationHub because it serves as the component within Flow Designer that facilitates the integration of ServiceNow with external systems and applications. IntegrationHub provides various pre-built connectors, also known as spokes, which allow developers to easily connect to third-party services through APIs. This functionality streamlines the process of creating integrations by providing out-of-the-box capabilities and reduces the need for manual coding, allowing developers to focus on workflow logic instead.

In addition to offering standard connectors for popular services, IntegrationHub also allows developers to create custom integrations, leverage web services, and utilize REST or SOAP connectors, thereby enhancing the overall operational efficiency and capabilities of ServiceNow.

The other options do not encapsulate integration capabilities. Workflow primarily focuses on automating processes within ServiceNow, Application Properties are used to define configurations for applications, and Data Sources pertain to importing and managing data rather than specifically enabling integration with external systems.