course:
https://stackskills.com/p/ethical-hacking-for-beginners
Overall verdict: Stay Away.
Better course for the money, adn this is not that expensive, so please let that tell you something.
Basic lectures are wrong in this course. The information presented about traceroute and DNS is just plain wrong in this course. Everything else is not that much different form similar coursework available from other sources. My suggestion is to look elsewhere.