Certified Kubernetes Application Developer (CKAD) Practice Test

The chosen answer indicates that HTTP/HTTPS is the protocol typically used for communication between services in Kubernetes. This is particularly relevant as HTTP is a widely adopted and well-understood protocol for client-server communication, allowing for easy integration and interaction between services. Kubernetes, often operating in microservices environments, benefits from HTTP/HTTPS because these protocols are stateless and support RESTful APIs, which are commonplace in service design.

Using HTTP/HTTPS allows for a range of features such as easily handling requests and responses, along with built-in mechanisms for routing and load balancing through various Kubernetes features like ingress controllers. Furthermore, many Kubernetes-native applications and services are designed to expose their APIs over HTTP/HTTPS, making it a standard approach for building and consuming services within a Kubernetes environment.

While other protocols like TCP/IP, gRPC, and WebSockets can also be utilized for service communication in Kubernetes, they are generally specialized or used for specific scenarios. TCP/IP is the foundation for network communication but does not specify the application layer protocol like HTTP. gRPC, which is becoming more popular for service-to-service communication, operates over HTTP/2 and provides advantages such as efficient serialization and support for bidirectional streaming. WebSockets facilitate real-time communication but are more niche and not typically