HELP!! Trouble finding practice material

I am in a Networking Basics class (pre-MCSE) and am looking for practice material above and beyond the pitifully lacking end of chapter material provided by the book itself. I am being denied of certainty of the material by not being able to practice it and apply the data I’ve learned. Does anyone know where I can find situational practice? Doesn’t matter what level. I will sort thru to find what I want. Thanks!