In college we used the Kurose textbook: https://www.amazon.com/Computer-Networking-Top-Down-Approach-7th/dp/0133594149/ref=pd_lpo_sbs_14_t_1/144-7058691-9847634

In college we used the Kurose textbook: https://www.amazon.com/Computer-Networking-Top-Down-Approach-7th/dp/0133594149/ref=pd_lpo_sbs_14_t_1/144-7058691-9847634?_encoding=UTF8&psc=1&refRID=F5HYF7KYH5SP96KQ41EN https://www.amazon.com/Computer-Networking-Top-Down-Approach... It explains just about every networking concept in grueling detail. However I don't remember anything I learned in that class, and now as a working developer don't have the time to work through a 900 page textbook. These Youtube playlists covered the important networking parts. Search Wikipedia for the topics you don't understand. 1) Stanford Networking: https://www.youtube.com/playlist?list=PLx_Dnlrnkd6f3mtJgmoBk2ugbRsf3ZxkH https://www.youtube.com/playlist?list=PLx_Dnlrnkd6f3mtJgmoBk... 2) New Boston: https://www.youtube.com/playlist?list=PL6gx4Cwl9DGBpuvPW0aHa7mKdn_k9SPKO https://www.youtube.com/playlist?list=PL6gx4Cwl9DGBpuvPW0aHa... 3) Gate Lectures by Ravindrababu Ravula: https://www.youtube.com/playlist?list=PLEbnTDJUr_IegfoqO4iPnPYQui46QqT0j https://www.youtube.com/playlist?list=PLEbnTDJUr_IegfoqO4iPn...