bandwidth

The width, in Hertz, of the pass-band of any equipment that can process information. Most computer data transfer works at base-band (unlike radio transmitters, which usually operate on some higher wave band) so the bandwidth is usually equal to its baud rate.

Our network has a 10 MHz bandwidth, so it can pass an absolute maximum of ten million bits per second, i.e. it works only up to 10 Mb (ten mega baud)

shebang

lot

The whole shebang = The whole lot

narrowcast

Like broadcast, but the information is aimed at a specific, limited audience. This is usually only possible on a network like the Internet, not with a radio transmitter.