Using a container security scanner to identify and fix vulnerabilities is the most effective measure for mitigating the risk of known vulnerabilities in your container images. These scanners analyze your images for known security issues and provide recommendations for patching or upgrading them. This helps you proactively address potential vulnerabilities and improve the overall security of your Kubernetes applications.

StatefulSets are designed for applications that require persistent storage and a stable identity for each pod. They guarantee that pods within the set retain their identities and access to the same persistent storage, making them ideal for highly available database deployments.

kube-proxy acts as a network proxy that enables communication between Pods and services within a Kubernetes cluster. It handles service discovery, load balancing, and network rules for Pods.

While configuring 'mutualTLS' in the Istio control plane enables the security feature, you need to explicitly enable it for individual services by applying the 'istio.io/auth' annotation with 'peerAuthentication: mutualTLS: { mode. STRICT Y to each service. This ensures that services in both clusters will only communicate with each other over encrypted channels- Options B, C, D, and E are not directly related to enforcing mutual TLS authentication for inter-cluster communication.

Kubernetes handles node failures by automatically restarting Pods that were running on the failed node. This is a key part of its self-healing capabilities. While the Pod might briefly be unavailable during the restart, the application should eventually resume operation on a different node.