General answer to your questions is "yes".
Here is the reason, that might help you to understand the SAS deployments.
On one hand, you will have a SAS Web Server (~adv. versioon of Apache) and SAS Web Application Servers (~adv. version of Tomcat). They will listen on the ports as defined on the configuration files (as described on the guide you are reading. And, when you make a request, it has to point to the server and port as configured.
In other hand, the requests are being answered, with the logic as implemented within SAS. While the communications between web pages are defined on the web applications (SASServerX_X\sas_webapps), the logic of the URL redirections is implemented on the SAS Metadata. And that is why you need to make the modification on the SAS metadata for the SAS Content Server, for the SAS Web Apps and for the SAS Foundation Services. And you modify port and the security (http/https).