Thanks for the tips and explanations.
---> About the RTL boards, I just got the cheapest (used) ones advertised here in my city. Overall, I got a total of items that, added together, cost me R$500.00 (~US$82.00) because the planners learned more before investing in hardware with better CPUs and PCIe i226 NICs. Yes, RTL is really scary, I had no problems using it for internet browsing, however, when using it for large transfers on the internal network, it was unsuccessful with files/folders larger than 4GB.
---> About the switch, I found it for a good price on Aliexpress, but I assumed that the VLAN network isolation would occur exclusively in the OPNSense settings so that there would be a way for the networks to communicate through the switch after isolation through the software. So, I'm wrong about VLAN isolation, right?
---> About the RTL boards, I just got the cheapest (used) ones advertised here in my city. Overall, I got a total of items that, added together, cost me R$500.00 (~US$82.00) because the planners learned more before investing in hardware with better CPUs and PCIe i226 NICs. Yes, RTL is really scary, I had no problems using it for internet browsing, however, when using it for large transfers on the internal network, it was unsuccessful with files/folders larger than 4GB.
---> About the switch, I found it for a good price on Aliexpress, but I assumed that the VLAN network isolation would occur exclusively in the OPNSense settings so that there would be a way for the networks to communicate through the switch after isolation through the software. So, I'm wrong about VLAN isolation, right?