Switches in RB1100

Hello

I have got RB1100.

What is a better?
Use one or two switches?

Example:

Wan port 1 Lan port 5 (all in switch 1)

or

Wan port 1 (switch1) Lan port 10 (switch2)

It is best to use 2 option. Both LAN and WAN will have separate 1Gbps connection to the CPU in that scenario.

Thanks

Best Regards