ZyXEL Communications NBG420N User Manual

NBG420N User’s Guide

The Sys Op Mode (System Operation Mode) function lets you configure whether your 
NBG420N is a router or AP. You can choose between Router Mode and AP Mode depending 
on your network topology and the features you require from your device. See 

 for more information on which mode to choose.

A router connects your local network with another network, such as the Internet. The router 
has two IP addresses, the LAN IP address and the WAN IP address.

Figure 160   LAN and WAN IP Addresses in Router Mode

An AP extends one network and so has just one IP address. All Ethernet ports on the AP have 
the same IP address. To connect to the Internet, another device, such as a router, is required.