A) Explanation: You can create a 'default' isolation policy for a namespace by creating a NetworkPolicy that selects all pods but does not allow any ingress traffic to those pods. --- apiVersion: networking.k8s.io/v1 kind: NetworkPolicy metadata: name: default-deny-ingress spec: podSelector: {} policyTypes: - Ingress You can create a 'default' egress isolation policy for a namespace by creating a NetworkPolicy that selects all pods but does not allow any egress traffic from those pods. --- apiVersion: networking.k8s.io/v1 kind: NetworkPolicy metadata: name: allow-all-egress spec: podSelector: {} egress: - {} policyTypes: - Egress Default deny all ingress and all egress traffic You can create a 'default' policy for a namespace which prevents all ingress AND egress traffic by creating the following NetworkPolicy in that namespace. --- apiVersion: networking.k8s.io/v1 kind: NetworkPolicy metadata: name: default-deny-all spec: podSelector: {} policyTypes: - Ingress - Egress This ensures that even pods that aren't selected by any other NetworkPolicy will not be allowed ingress or egress traffic.