The administrator at JK Cements wants you to assign a port number other than the standard port $80$ to a web server on the Internet so that several people within the organization can test the site before the web server is made available to the public. To reach the web server, which type of port number must a tester enter in the browser address box along with the web server's IP address?

Group of answer choices

A dynamic port number

A well$-$known port number

A registered port number

A private port number