At the moment, there is no fiber in the old buildings and therefore no switches that are capable of connecting fiber. We will need at least 2 of these switches, one in the serverroom in the old building and one in the serverroom in the new building.
We have 3 buildings connected with copper (cat5e). Our plan is to change this to fiber when we have the fiber going to the new building.
In the buildings (both existing and new) the internal cabling is copper, in the new building this will be 1Gbit to the client. Current backbone is 1Gbit, 100Mbit to the clients. I don't know if a 10Gbit backbone is necessary?