What is the WebSphere Application Server Console and what is it’s role? What is the default URL and port for accessing it.

The administrative console is a browser-based interface that allows you to configure application server settings, deploy and manage applications, and perform additional tasks that are not included in the HTTP Server Administration interface. It used to be a Java application, however to be firewall safe it was made into a web-based application.
It runs on the default install port 9060 e.g http:\\hostname:9060\ibm\console, however this can be changed by editing virtual_hosts names. also when during installation ie GUI or response-file install you can set the ports that will be used.