The first and last bullets are extremely optimistic. How do you possibly simulate all the weird interdependent behavior in real world networks?
Given that a Cisco switch can be replaced with some other company's switch(at least in theory, idk), without weird unknown cases interfering, why would this be a problem ?
loading story #50305995
there is software to simulate any arbitrarily complex network: GNS3, eve-ng, Cisco Modeling labs, etc
loading story #50312146