An administrator is deploying vSphere Kubernetes Service (VKS) to support containerized workloads across multiple regions. Each region hosts a…

For a Supervisor deployed on a vSphere Distributed Switch (VDS), Antrea is the default and fully integrated Container Network Interface (CNI). Antrea is an open-source project that leverages Open vSwitch to provide Kubernetes networking and security services. It directly meets the requirements for pod-to-pod communication observability and control through Kubernetes Network Policies without requiring additional licensing or a complex secondary network overlay. It is the standard, out-of-the-box CNI solution for VDS-based vSphere with Tanzu deployments.

B. Calico is a popular and powerful CNI, but it is not the default integrated option for Supervisor deployments on VDS. It is the CNI used when deploying a Supervisor with NSX networking.
C. Flannel is a basic CNI focused on providing a simple network fabric but lacks the advanced features like network policy enforcement required by the scenario.
D. Cilium is a CNI known for its eBPF-based implementation, offering high performance and security, but it is not the default supported CNI for a Supervisor on VDS.

1. VMware vSphere with Tanzu Configuration and Management Guide. "Supervisor Networking". This document specifies that when you configure a Supervisor with VDS networking, Antrea is automatically deployed as the CNI for the Supervisor and any Tanzu Kubernetes Grid clusters.

2. VMware vSphere 8.0 Documentation. "Container Network Interface for a Supervisor". The documentation states, "For a Supervisor that is configured with vSphere networking, the default CNI is Antrea."

3. Antrea Project Documentation (antrea.io). The official project site describes Antrea as a "Kubernetes-native project that provides networking and security services for a Kubernetes cluster," which aligns with the capabilities required in the question.