Using SFP port as regular rj-45 port

Hello!

Sorry for this elementary question but I have never use SFP modules before.
I need to connect one more server but currently all ports are busy. SFP looks like a chance to me. May I use this port(+S-RJ01 module) to connect to my ISP by regular twisted pair(rj45)?

I’m using RB2011UiAS-2HnD-IN.

Yes you can use an RJ01 to do this.

Thank you!