Referring to the following image:

A student has started a Packet Tracer network that includes a home wireless router to be used for both wired and wireless devices. The router and laptop have been placed within the logical workspace. The student clicks on the laptop and the window that opens is shown in the exhibit.

What is the purpose of the modules on the left $??$

These are modules that can be used by double$-$clicking on one module so that it automatically installs into the laptop

This is the list of modules currently installed in the laptop

This is a list of modules available from the manufacturer that can be clicked on and "purchased"

hese are optional modules that can be installed into the module slot if it is currently empty