Hello Urvish Patel

I hope you are doing good . With reference to your query , in my opinion for computer networking you must follow the roadmap of  BABBAR youtube channel ,it is very informative and easy to learn. Following are the names of some sites:-

1. Udemy

2. Coursera

3.Futurelearn

4. SkillShare

5.Lynda

Hope you found this answer helpful. Good luck for your future