Hello,I have an ADSL fiber optic line coming from my ISP, I do not want to use the router of my ISP, then what router cisco then I use please? Knowing that there will be 3 L2 switch cisco after, that I want to connect to router by fiber optic  thank ...

Hello,Please help me decide on the necessary hardware, currently my network consists of an ADSL fiber optic modem router + an unregulated GE 24-port switch of ordinary brand + a computer serving as a server for a management application + 20 computers...