@bearmine@gamepad.club in really simple terms, layer 3 switches are capable of routing because they ingest routing/forwarding tables into their hardware memory (usually a set of ASICs), while an unmanaged switch simply memorizes MAC addresses, L3 switches will switch at L2 or L3 so compared to a router, they're aware of things like ARP and ACLs but they're only designed to process those concepts, not configure and manage them (IANA network engineer tho, just a sysadmin)