I know that fiber optic is used for bandwidths well over 1GBe and over 10GBe (now with cat6a 10gb is possible) but they i came across a 100Mbit/s and 1GBe fiber optic cards. Whats the catch. Are 100Mbit/s fiber optic better than the copper? The regular copper cables can handle the 100 and 1gb of bandwidth pretty well and it's a lot cheaper. I though fiber optic was only for a lot of bandwidth.