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
8 different between WAN and LAN port.
How to set up router connection for Lan-Lan or Lan-Wan
What is LAN? What is WAN? And What is NAT?
Allow LAN Client to Choose the Outgoing WAN by LAN IP Alias | DrayTek
WAN vs. LAN: Compare Wide Area Network to Local Area Network - IPXO
How To: Setting up File and Printer sharing between two routers - SmallNetBuilder