Merge pull request #21244 from tnqn/apiserver-port

Unify typical apiserver port in docs

Author: k8s-ci-robot

content/en/docs/concepts/architecture/control-plane-node-communication.md

@@ -18,7 +18,7 @@ This document catalogs the communication paths between the control plane (really
 <!-- body -->
 
 ## Node to Control Plane
-All communication paths from the nodes to the control plane terminate at the apiserver (none of the other master components are designed to expose remote services). In a typical deployment, the apiserver is configured to listen for remote connections on a secure HTTPS port (443) with one or more forms of client [authentication](/docs/reference/access-authn-authz/authentication/) enabled.
+Kubernetes has a "hub-and-spoke" API pattern. All API usage from nodes (or the pods they run) terminate at the apiserver (none of the other control plane components are designed to expose remote services). The apiserver is configured to listen for remote connections on a secure HTTPS port (typically 443) with one or more forms of client [authentication](/docs/reference/access-authn-authz/authentication/) enabled.
 One or more forms of [authorization](/docs/reference/access-authn-authz/authorization/) should be enabled, especially if [anonymous requests](/docs/reference/access-authn-authz/authentication/#anonymous-requests) or [service account tokens](/docs/reference/access-authn-authz/authentication/#service-account-tokens) are allowed.
 
 Nodes should be provisioned with the public root certificate for the cluster such that they can connect securely to the apiserver along with valid client credentials. For example, on a default GKE deployment, the client credentials provided to the kubelet are in the form of a client certificate. See [kubelet TLS bootstrapping](/docs/reference/command-line-tools-reference/kubelet-tls-bootstrapping/) for automated provisioning of kubelet client certificates.

content/en/docs/reference/access-authn-authz/controlling-access.md

@@ -23,7 +23,7 @@ following diagram:
 
 ## Transport Security
 
-In a typical Kubernetes cluster, the API serves on port 6443.
+In a typical Kubernetes cluster, the API serves on port 443.
 The API server presents a certificate. This certificate is
 often self-signed, so `$USER/.kube/config` on the user's machine typically
 contains the root certificate for the API server's certificate, which when specified