LAN Interconnection and Internetworking
The realm of LAN interconnection devices offers a number of options. This section discusses the nature of hubs, LAN switches, virtual LANs (VLANs), bridges, routers, and IP switches.
Hubs interconnect the wiring that's connected to workstations. They are a building block of most networks. There are three major types of hubs:
Active— Active hubs regenerate and retransmit signals, just as a repeater does. Because hubs typically have 8 to 12 ports for network computers to connect to, they are sometimes called multiport repeaters. Active hubs require electrical power to run (that's why they're called active).
Passive— Passive hubs serve as connection points and do not regenerate the signal; the signal simply ...