I currently have a Spectrum modem and router. Right now it is only used for WIFI and security cameras remote access. This is in a new restaurant that is opening soon. The owner wants to have a secure network for his Point of Sale credit card transactions. He also wants to continue to have access to the cameras and offer free WIFI to his customers. The POS system is all hardwired. What is the simplest way to accomplish this? I think the POS and the cameras/guest access should be separate networks but not really sure how to accomplish that.