lan---- Network interface card (connecting to a computer)
ac- Indicates the power port
re---- Restore factory button
2, now the common home router, regardless of wireless or wired, generally behind the 5 plug network cable jacks, one of which is significantly different from the other four, WAN port, is the excuse for the external network into the router, generally this interface is connected from the cat out of the network cable or the network cable of the superior network. The other four interfaces are LAN interface, that is, the interface of the internal LAN, the level of these four interfaces is equal, the network speed is the same, and there is no difference in theory. If you go to the router Settings page, you can see that the router does not recognize which interface you are connected to. If your computer's physical address is limited by the Internet speed, it doesn't matter which interface you connect to.