Configure each port to its own broadcast domain (RB750Gr3)

I wish to use an RB750Gr3 as a router for 5 different subnets, such that each port is separately configured to have its own broadcast domain.

Would it be better (performance-wise, security-wise, etc.) to bridge eth1-eth5, enable VLAN, and assign each port as an access port? Or create 5 separate bridges one each for eth1-eth5?

Don’t need any bridges then, best way is to simply configure the gateway ip on each port

Thank you CZFan, I wouldn’t have thought of this option if it weren’t for your post. Of course, if the default Mikrotik configuration had to explicitly to bridge the ports together to realize the typical home router (where LAN1-LAN4 are of a single broadcast domain), simply unbridging them ought to do the trick. Alas, I might not get the chance to try this out though, as it turns out I’ve run out of ports and might be forced to use VLAN trunks instead. Nevertheless, thank you for the tip that may come in handy in the future!