Yes, someone knows and can explain it simply.
Yes, someone knows and can explain it simply.
The suggestions are quite clear. If you're into gaming, Lan 4 is the better choice.
A subnet represents a segment of a larger network. Imagine your public IP address as your city, the subnet as your town, and your local IP as your home address. It's feasible to have several smaller networks operating within one extensive network. This approach is beneficial in expansive systems where domains help organize distinct sections or, as mentioned, to isolate security devices from the primary network. To establish direct connections between subnets, you must set up bridges or static routes, which manage access control and determine which devices are permitted entry into each subnet.
An "overlapping network" on LAN 4 would refer to a setup that shares the same IP range as LAN 1-3. For instance, if you configure 192.168.1.x in LAN 1-3, using the same range on LAN 4 would require switching to a different network or subnet. This prevents direct communication between devices on the two networks. Instead of a straightforward switch, a router with NAT functionality is needed to translate addresses between the ranges.
As discussed by @Fasauceome, the details go deeper. It’s about adding extra networks. That’s the simplest part to explain. If you don’t need it, just skip it. Likely the speeds on that port will be a bit slower too. Stick with the first three and you’re good. If you want more, get a cheap switch and connect it to one of the first three Ethernet ports.