Also, I see on the UIA website: "Gigabit WiFi router rental $4.95 per month" - but I don't see anything about the modem. From my limited research, is there even a modem to speak of, like there is with DSL or cable? How is the fiber connection terminated to the house.
There is something called an ONT. Laser in, Gigabit Ethernet out. It needs to be mounted inside near power.
For $5/month, UIA will supply a router and manage it for you. If you aren't up to speed technically or just don't want to bother with it, this is a really good idea.
If you are, it's a very normal plain vanilla Ethernet connection. DHCP if you don't have a static IP, the same or simpler if you have static addresses.