networking - What is the purpose of multiple ethernet ports on my modem? - Server Fault

networking - Two routers or one router and WAP? - Server Fault

Why Do I Need a Dual Ethernet Console Server?

How to Turn an Old Router into a Wi-Fi Extender or Switch

WAN Port on Router Explained - What is it and How to use it

networking - LAN connection not working in network with two routers (WiFi works) - Super User

An extendable router from ASUS gives your WiFi network room to grow - Edge Up

Does using multiple network over single port (like my use-case in this drawing) significantly reduce network performance? Most of devices connected would be smart-devices like smart bulb or some other network-enabled devices

How to Fix Network Cable Unplugged Errors in Windows

Essential Network Installation Devices

What Is Ethernet? Definition, Types, and Uses - Spiceworks

Can ethernet port on a router used to power up other device? - Quora

One Switch Made to Expand Network 8× 10/100/1000Mbps RJ45 Ports supporting Auto Negotiation and Auto MDI/MDIX, Plug and play, no configuration needed

TP-Link TL-SG108 8 Port Gigabit Unmanaged Ethernet Network Switch, Ethernet Splitter Plug & Play Fanless Metal Design Shielded Ports Traffic

How to Get Wired Internet in Another Room in 7 Easy Steps - Race Communications