CKA exam allould documentation

Hello regarding the Kubernetes official documentation , some of the links of the examples are leading to GitHub pages and I am not entirely sure if they are allowed on the real exam.

More specifically Types of Persistent Volumes or more specifically iscsi PV type.
In my firs attempt I had some question related to that but all examples were in the github link and I panicked.

They generally speaking would NOT be allowed. If it’s not on the list of allowed sources, you won’t be able to get the Firefox browser to fetch them – they are literally blocked by PSI. And if you aren’t allowed the docs, you will not be asked a question that requires access to it. So Don’t Panic.

So can I assume that the browser opens only allowed web pages and everything accessible from their browser is allowed as resource ?

I am told that the browser is set up exactly that way. But I’ve never tried to look up something I knew was not on the list during an exam, so this is second hand knowledge. One of my colleagues has asked the LF people about this, and that’s what they told him.