Can we do outside courses after admitted to PG?

[sialiblo]

I wanted to purse  BS cybersecurity in Purdue Global, I am not applied yet. I am currently still working on some IT certificates (comptia,ccna and others) that is listed on their transferrable IT certificates table.

My question is, how is it usually works regarding admission and transfers. Do you work on your own until you have 135 max transfer ready, and then you apply to PG, or you can apply to PG anytime? I am wondering, once we have applied and admitted as student to PG, do we have to take classes from PG exclusively every semester, or can we still finish outside courses from sophia/SDC/IT Certs etc. ?

Thanks.