A Manager gave me a job on the condition I learn the basics of R/S in 3 weeks.

I work as an English teacher for a tech company, I’ve been intent on passing the CCNA and applying with them. Today one of my students said they have an open entry level position through a contractor that must be filled in three weeks.

If I can explain down to the 1’s and 0’s how the networks are connected, and pass the approval of their engineers I have the job.

They said to focus on the R/S book and packer tracer labs. “Show us you know the basics”

So my question: Does anyone have recommendations on the topics I need to study for a 3 week crash course into routing and switching to impress an engineer?

(I have every book and lab available to me)