Service is a named abstraction of software service (for example, mysql) consisting of local port (for example 3306) that the proxy listens on, and the selector that determines which pods will answer requests sent through the proxy.
Endpoints is a collection of endpoints that implement the actual service.
EndpointSlice represents a subset of the endpoints that implement a service.
Ingress is a collection of rules that allow inbound connections to reach the endpoints defined by a backend.
IngressClass represents the class of the Ingress, referenced by the Ingress Spec.