What is the default behaviour of a pod in a Kubernetes cluster that does not have any NetworkPolicies applied to it?

What is the default behaviour of a pod in a Kubernetes cluster that does not have any NetworkPolicies applied to it?

• A. It can send and receive traffic from any source
• B. It is isolated from all network traffic
• C. It can only receive but not send traffic
• D. Traffic is restricted to a dedicated policy namespace

Answer: (C)

NetworkPolicy controls how pods talk to each other, and if no policy selects a given pod, there are effectively no restrictions on its traffic. This means the pod can send and receive traffic from any source and to any destination. Network policies only apply when a policy selects the pod; in that case, the allowed ingress and egress are limited to the rules you define. So the default behavior without any NetworkPolicies is open communication in both directions. The idea that a pod would only receive traffic, or that traffic is restricted to a policy namespace, doesn't apply in the absence of policies.

NetworkPolicy controls how pods talk to each other, and if no policy selects a given pod, there are effectively no restrictions on its traffic. This means the pod can send and receive traffic from any source and to any destination. Network policies only apply when a policy selects the pod; in that case, the allowed ingress and egress are limited to the rules you define. So the default behavior without any NetworkPolicies is open communication in both directions. The idea that a pod would only receive traffic, or that traffic is restricted to a policy namespace, doesn't apply in the absence of policies.