Which of the following is true regarding switched backbones?
Answers:
A. They place all network devices for one part of the building physically in the same room, often in a rack of equipment
B. They have an advantage of requiring less cable
C. They make it more difficult to move computers from one LAN to another
D. Network capacity is always tied to the physical location of the computers
E. They are harder to maintain and upgrade than a BN that is not rack-based

A computer network that uses only network switches, as opposed to Ethernet hubs on Ethernet networks, is referred to as a fully switched network.
Switched Backbones are used in new construction, in the distribution layer, and occasionally in the core layer. They can be rack- or chassis-based. the numerous routers of other designs are replaced Backbone has fewer devices but more cables.
Rack-Based Exchanged Backbones puts all network switch hardware in a single "rack" room. simple to upgrade and maintain. requires more cable, though this is typically a minor portion of the cost.
switchable backbones based on a chassis Instead of using a rack, use a chassis switch that allows administrators to plug modules into it.

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