If you are not familiar with the oc command, refer to OpenShift - Getting Started with the oc command.

An OpenShift route or an Ingress route will provide a URL such as http://route001-project001.apps.openshift.example.com:8080 which is used to route a request onto a service, which is then routed onto a pod, and then to the container in the pod, and finally to the application running in the container.

Egress provides a way for an application deployed on OpenShift to access an external URL, such as http://www.example.com.

The Ingress Controllers and Ingress Routers are responsible for allowing external requests access to routes/services/pods/apps.

The oc get ingresscontroller command can be used to list the Ingress Controllers which are in the openshift-ingress-operator namespace.

~]$ oc get ingresscontroller --namespace openshift-ingress-operator
NAME              AGE
default           360d
external-router   356d
internal-router   356d

The oc get services command can be used to list the Ingress Routers which are in the openshift-ingress namespace.

~]$ oc get services --namespace openshift-ingress
NAME                              TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE
router-internal-default           ClusterIP   172.30.147.55    <none>        80/TCP,443/TCP,1936/TCP      423d
router-internal-external-router   ClusterIP   172.30.173.34    <none>        80/TCP,443/TCP,1936/TCP      419d
router-internal-internal-router   ClusterIP   172.30.209.168   <none>        80/TCP,443/TCP,1936/TCP      419d
router-nodeport-external-router   NodePort    172.30.21.4      <none>        80:32080/TCP,443:32443/TCP   419d
router-nodeport-internal-router   NodePort    172.30.185.219   <none>        80:31080/TCP,443:31443/TCP   419d

The oc describe ingresscontroller command can be used to display more information about an Ingress Controller.

~]$ oc describe ingresscontroller default --namespace openshift-ingress-operator
Name:         default
Namespace:    openshift-ingress-operator
Labels:       <none>
Annotations:  <none>
API Version:  operator.openshift.io/v1
Kind:         IngressController
Metadata:
  Creation Timestamp:  2021-07-16T17:13:54Z
  Finalizers:
    ingresscontroller.operator.openshift.io/finalizer-ingresscontroller
  Generation:  4
  Managed Fields:
    API Version:  operator.openshift.io/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:metadata:
        f:annotations:
          .:
          f:kubectl.kubernetes.io/last-applied-configuration:
      f:spec:
        f:replicas:
        f:routeSelector:
          .:
          f:matchLabels:
            .:
            f:route-type:
    Manager:      kubectl-client-side-apply
    Operation:    Update
    Time:         2021-07-20T18:21:18Z
    API Version:  operator.openshift.io/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:spec:
        f:defaultCertificate:
          .:
          f:name:
        f:nodePlacement:
          .:
          f:nodeSelector:
            .:
            f:matchLabels:
              .:
              f:default-router:
    Manager:      kubectl-patch
    Operation:    Update
    Time:         2021-09-15T17:51:57Z
    API Version:  operator.openshift.io/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:metadata:
        f:finalizers:
          .:
          v:"ingresscontroller.operator.openshift.io/finalizer-ingresscontroller":
      f:spec:
      f:status:
        .:
        f:availableReplicas:
        f:conditions:
        f:domain:
        f:endpointPublishingStrategy:
          .:
          f:type:
        f:observedGeneration:
        f:selector:
        f:tlsProfile:
          .:
          f:ciphers:
          f:minTLSVersion:
    Manager:         ingress-operator
    Operation:       Update
    Time:            2021-10-14T15:24:30Z
  Resource Version:  411503452
  UID:               f1674657-2e23-444e-9839-83c0fd479448
Spec:
  Default Certificate:
    Name:  apps-cert-2022
  Node Placement:
    Node Selector:
      Match Labels:
        Default - Router:  
  Replicas:                3
  Route Selector:
    Match Labels:
      Route - Type:  default
Status:
  Available Replicas:  3
  Conditions:
    Last Transition Time:  2021-07-16T17:13:55Z
    Reason:                Valid
    Status:                True
    Type:                  Admitted
    Last Transition Time:  2022-06-22T14:14:34Z
    Status:                True
    Type:                  PodsScheduled
    Last Transition Time:  2022-06-22T14:08:50Z
    Status:                True
    Type:                  Available
    Last Transition Time:  2022-06-22T14:08:50Z
    Message:               The deployment has Available status condition set to True
    Reason:                DeploymentAvailable
    Status:                True
    Type:                  DeploymentAvailable
    Last Transition Time:  2022-06-22T14:08:50Z
    Message:               Minimum replicas requirement is met
    Reason:                DeploymentMinimumReplicasMet
    Status:                True
    Type:                  DeploymentReplicasMinAvailable
    Last Transition Time:  2022-06-22T14:15:04Z
    Message:               All replicas are available
    Reason:                DeploymentReplicasAvailable
    Status:                True
    Type:                  DeploymentReplicasAllAvailable
    Last Transition Time:  2021-07-16T17:13:55Z
    Message:               The configured endpoint publishing strategy does not include a managed load balancer
    Reason:                EndpointPublishingStrategyExcludesManagedLoadBalancer
    Status:                False
    Type:                  LoadBalancerManaged
    Last Transition Time:  2021-07-16T17:13:55Z
    Message:               No DNS zones are defined in the cluster dns config.
    Reason:                NoDNSZones
    Status:                False
    Type:                  DNSManaged
    Last Transition Time:  2021-10-05T13:56:44Z
    Status:                False
    Type:                  Degraded
  Domain:                  apps.openshift.example.com
  Endpoint Publishing Strategy:
    Type:               HostNetwork
  Observed Generation:  4
  Selector:             ingresscontroller.operator.openshift.io/deployment-ingresscontroller=default
  Tls Profile:
    Ciphers:
      TLS_AES_128_GCM_SHA256
      TLS_AES_256_GCM_SHA384
      TLS_CHACHA20_POLY1305_SHA256
      ECDHE-ECDSA-AES128-GCM-SHA256
      ECDHE-RSA-AES128-GCM-SHA256
      ECDHE-ECDSA-AES256-GCM-SHA384
      ECDHE-RSA-AES256-GCM-SHA384
      ECDHE-ECDSA-CHACHA20-POLY1305
      ECDHE-RSA-CHACHA20-POLY1305
      DHE-RSA-AES128-GCM-SHA256
      DHE-RSA-AES256-GCM-SHA384
    Min TLS Version:  VersionTLS12
Events:               <none>