I currently have a 300Mbps wireless router (TP Link WR841N v9) hooked up to a cable modem. This provides internet access for my home network (tablets, desktop, laptops, printer, etc.).
I want to set up a guest network for a different part of my house which would be unable to access the home network (isolated from the home network). From what I understand, here are my best options:
Cascading a second router from my main router via an ethernet cable (LAN port on main router to WAN on secondary router) with DHCP on
Set up second router in repeater mode with DHCP on (wireless communication between main router and secondary router)
Get a non-wireless router connected to the cable modem then have both the main router and secondary router connect to that (triple Y-config). That requires getting a non-wireless router and second router though, so is less preferable in terms of $.
Can someone confirm that these options will provide a secondary wireless network that will not be able to access data/traffic/devices from the home network?
The downside to option 1 is that because the secondary network will be for a different part of my house (cannot run ethernet cable there) devices in that area would have to be run off of wireless, instead of having the option to be hardwired. Because of this I think I prefer option 2, but have a few questions.
I understand option 2 will reduce the throughput by 50%. Will this reduction in bandwidth be felt on the secondary router (repeater) only? Also, does the bandwidth reduction refer to the router speed or internet speed (if I use a 300Mbps router with a 75Mbps downstream cable internet connection, would I notice a degradation of internet speed?)
Also, for option 2, would someone definitely be able to connect to the repeater router via a hardwired connection or a wireless connection?