E) How far away from the switch can the Computers/User(s) be?

Depending on the model you have purchased the CPUs and Users can be anything up to 300mtrs away without the need for a KVM extender or IP device. However, with the use of an Extender or IP device any CPU or User can be up to 500 meters away over Copper, 10km over Fibre and anywhere in world over IP.