Home routers have WAN and LAN ports (or LAN interfaces) which are used to connect different devices. WAN ports are used to connect to an extranet. WAN ports also connect to upper-level networks such as home optical modems and network cables. Each WAN port has an IP address. When a phone or computer tries to connect to an extranet, its IP address needs to be converted to the WAN port IP address. (2) LAN port LAN ports are used to connect to devices like computers, printers, and switches. As shown in the following figure, the address pool configured for the LAN port, which includes IP addresses ranging from 192.168.110.1 to 192.168.110.254, is allocated to wired and wireless devices like phones and computers.  WAN ports cannot be used to connect to computers. Similarly, LAN ports cannot be used to connect to optical modems and network cables because that may cause router Internet access failures. |
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