networking - Expanding wireless coverage: What are the differences between LAN to LAN and LAN to WAN when it comes to connecting two wireless routers? - Super User
LAN vs WAN: Understanding the Differences and Uses
LAN vs WAN: Understanding the Differences and Uses
LAN Port vs WAN Port: What's the Difference? How to Use?
What is the LAN WAN port on a modem used for? - Quora