E
Explanation: Switches increases the number of collisions domains in the network. Switches that are configured with VLANs will reduce the size of the collision domains by increasing the number of collision domains in a network, but making them smaller than that of one big, flat network.
Incorrect Answers:


A. Switches are capable of VLAN configurations, but hubs are not.


B. Hubs are generally the least costly method possible to connect multiple devices
together in a network.


C. Switches forward broadcasts and multicasts, by default, to all ports within the same
VLAN. Only routers block all broadcast traffic by default.


D. Switches and hubs can be equally efficient in processing frames, in theory. In
practice, switches are generally more efficient as they usually have more CPU and
memory allocated to them, and are generally much more expensive than a simple hub.   _{Your Comment}