Hi Cletus,
First, you need to choose which software image to use on your firepower 2110.
I can choose to use FTD software or ASA software.
If you choose FTD software on Firepower 2110 you have two options to manage it over a GUI with a web browser:
1. On-box management with FDM (Firepower Device Manager), feature configuration limited in respect to FMC
2. FMC (Firepower Management Center), all features configurable. (FMC is another machine, virtual or physical)
If you choose ASA software you can manage it through ASDM, Java-based GUI.
Let me know if you have any questions or doubts.
Matteo
