CompTIA Network+

Answer: C - Routers can determine the size of a broadcast domain.

Key Takeaway: A network where any node can communicate directly with any other node without having to go through a central routing device is considered a broadcast domain. As switches can only route traffic to devices on the same segment, they effectively would not be able to determine the size of a broadcast domain. However, routers can route traffic between segments and even LANs. Because of this, the router is the device that can be used to specify how large or small the broadcast domain will be.