In Access Point (AP) mode, router connects to a wireless router through an Ethernet cable to extend the coverage of wireless signal to other network clients....
If you have any old routers lying around, you can use them as Access Points to extend the wireless coverage of your current network. You can save money by no...
The steps for configuring two ASUS Routers as AiMesh Access Points are listed below. In AP mode, AiMesh Routers connect to a wireless router via an Ethernet connection and distribute the wireless signal to other network clients. The firewall by default disables IP sharing and NAT.

Furthermore, visual representations like the one above help us fully grasp the concept of Asus Router As Access Point Mode.
As we know access point router requires an Ethernet cable to connect to the parent modem or your router and this cable is used to transmit your wired network signals in wireless network signals. Step by Step Procedure to Setup Asus Router as Access Point.
If not, I will need to purchase an additional switch to connect both the WiFi Access Point and wired devices to a single ethernet line connected to the wired router in the basement. Thanks for your attention.If you use an Asus route in Access Point Mode, this picture is INCORRECT...

The Asus router should have an access point mode. Forget where it is. One of the tabs under Admin or LAN I think.I fixed the Asus router to 192.168.0.100 as an access point, and now I can access the settings page via this URL.