How a packet moves through network 

GeeksforGeeks: Their Computer Network Tutorial covers basic to advanced concepts, including data link layer, network layer, network security, and cryptography. You’ll learn about LAN, MAN, and WAN networks, as well as various protocols and technologies1.
Cisco: The Networking Fundamentals guide by Cisco provides insights into hubs, switches, routers, firewalls, and gateways. It also explains Layer 2 switching, Layer 3 switching, and routing. Additionally, it delves into the layers of the OSI model and different physical media types2.
Microsoft Learn: Microsoft’s Fundamentals of Computer Networking module covers network protocols, standards, types, topologies, and network devices. It also touches on communication principles like TCP/IP, DNS, and ports3.
CCNA Networking Academy: The Introduction to Networks course focuses on building LANs, configuring routers and switches, and enabling end-to-end connectivity between devices. It covers IPv4 and IPv6 addressing schemes4.