I have a main router (Router A) which is connected to the Modem. So can i use another router (Router B) connected via LAN cable to act as a switch or Second Access Point ? and does Router B need to be configure ? or its just Plug and Play (PNP) ?
for what i think , if connect another router (router mean will assign IP to device) , you need to configure as a Access Point , so it will point to your main router to get IP , or will maybe facing internet connection issue cause router B itself don't have internet access .
You need to configure the Fiberhome Router first to DHCP configuration and after that you may use it as Dekstop Switch