For a 3800 series router, what module can i use for a dedicated 100MB fiber connection.
The 3800 series routers come with one dual purpose Gigabit port. By defualt the media-type is RJ-45.
You can use the SFP module (GLC-SX-MM= , if it is multimode)on this port and change the media-type to support fiber.
interface gi 0/0
HTH, rate if it does