Is it possible to access Pod without Service?

Yes, you can connect directly to a Pod without using a Service, but with limitations:

• Inside the cluster: if the Pod's IP is known, you can connect directly, for example, via kubectl exec or from another Pod by IP.
• Outside the cluster: connecting directly to a Pod is difficult because the Pod's IP is dynamic and changes upon restart.

A Service in Kubernetes creates a stable access point (virtual IP and DNS name) that abstracts the dynamic Pods. Therefore, for reliable and persistent access to applications, it is recommended to use a Service.

Example: for debugging, you can connect directly to a Pod, but for ongoing interaction, it is better to use a Service.