this post was submitted on 26 Mar 2026
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I think you actually need 3.
Otherwise there is no real "routing" just "in here, out there" and vice versa.
The "routing" can still refer to routing to devices attached via a switch. So no need for a third port to qualify as a router.
It's a router if it operates on layer 3. Most WiFi routers only use two interfaces (ISP side and WiFi) and yet they are routers. They also provide a later 3 firewall.
But several devices can connect to the WiFi side.
Counts as multiple endpoint devices.
Technically you only need 1 interface when using VLANs. Basically any device with a CPU and NIC can be a router.