August 14, 2015: AT&T joins T-Mobile and Verizon in offering new contract free plans based on monthly data caps. The carrier is offering five tiers, starting with 300MB of data for $20 per month, then escalating to 2GB for $30, 5GB for $50, 15GB for $100 (probably the best deal), and 20GB for $140.
The Hub and Spigot are two types of fitting on either end of a pipe. At one end you have the Hub (Socket) fitting; which is a female end of a fitting designed to accept pipe or a SPIGOT connector. At the other end you have the Spigot fitting; which is a male end of a fitting designed to be used inside another fittings Socket (or Hub) end.
Hubs: As you can see in the image an ethernet hub transmits the data frame to every device, except the device that sent the frame. A hub is just a pass-through and distribution point for every device connected to it, without regard of what kind of data is passing through and where the data might be going. Today, hubs are outdated technology that have been replaced by switches.