OSI Model Courses
(ISC)² via Coursera Los bits y bytes de las redes informáticas
Crece con Google via Coursera IT Networking Fundamentals For Complete Beginners
Udemy Basic Network and Database Security
IBM via edX The Complete Networking Fundamentals Course. Your CCNA start
Udemy Arquitetura de Redes
Udemy Formação em Redes de Computadores - Módulo 0
Udemy TCP and UDP Operation
Pluralsight TCP/IP and Networking Fundamentals for Sysadmins
Pluralsight Troubleshooting for CompTIA Network+ (N10-006)
Pluralsight