Which feature in NSX-T helps in automating the deployment of network services?

The feature in NSX-T that aids in automating the deployment of network services is Service Insertion. This functionality allows for the integration of third-party services into the NSX-T architecture, facilitating a seamless connection between the virtualized network and external services such as firewalls, load balancers, or intrusion detection systems.

Service Insertion automates the process by enabling the configuration of these services as part of the overall networking policy. This means that when a network service is needed, NSX-T can automatically deploy and manage the required service based on predefined policies and endpoints, simplifying the operational workflow and reducing the potential for human error.

The other options, while related to network services and automation in some capacity, do not specifically focus on the automation of service deployment like Service Insertion does. Service Discovery refers to identifying and learning about existing services in the network, Service Mapping involves visualizing and tracking the relationships between different services and components within the network, and Service Extraction pertains to the removal or disengagement of services. None of these provide the same level of automation directly tied to service deployment that Service Insertion offers.