What is the function of the Edge Firewall in NSX-T?

The function of the Edge Firewall in NSX-T is primarily to provide perimeter protection for deployed applications. It operates at the edge of the virtual network and is responsible for controlling traffic entering or leaving the virtualized environment. By implementing policies and rules, the Edge Firewall helps secure the perimeter against external threats while allowing legitimate traffic to flow freely.

This capability is crucial for maintaining the overall security posture of the applications as they communicate with external networks and the internet. The Edge Firewall can filter and monitor traffic based on various parameters such as IP addresses, protocols, and ports, ensuring that only authorized traffic is permitted while potentially harmful traffic is blocked.

In comparison, the other options describe functionalities that are either not specific to the Edge Firewall or are primarily handled by other components within the NSX-T architecture. For example, the internal network security function typically pertains to distributed firewalls or other internal security mechanisms, and acting as a default gateway is a role fulfilled by the Edge Services, not specifically the Edge Firewall. Lastly, creating virtual networks is a foundational capability of NSX-T itself, rather than a specific function of an Edge Firewall.