Chapter Summary
Repeaters, hubs, bridges, switches, routers, and brouters are used to control and extend the usable size of a network.
Repeaters work against attenuation by repeating signals that they receive on the network. Repeaters work at the Physical layer of the OSI model.
A hub ties several networking cables together to create a link between different stations on a network. An active hub has its own electrical power; a passive hub provides no signal regeneration.