I signed up for the free Cybersecurity Certification (CC) test from ISC2. Only if you register by 30 Apr 24
The free online material was adaptive. Complete the pre-assessment test and the slides will be adapted to the weak areas. I finished everything and felt a bit lacking so I went to YouTube. There were several channels focussing on this CC test. It was good to refresh my knowledge of OSI 7 layers and who does what.
Interestingly, the exam questions were easier than the Youtube questions.