As for the way equipment achieves that match... usually it's with a big honking resistor. What could be simpler?
RF equipment, where power efficiency is more important than strict impedance matching, typically does not have a dynamic impedance match. That is, if you transmit power at the output port, expect to see some reflecting back.
For a possible analogy, consider molten metallic copper:
http://commons.wikimedia.org/wiki/File:Copper_just_above_its_melting_point.jpg#mediaviewer/File:Copper_just_above_its_melting_point.jpgeven though it is glowing (incandescent), it doesn't cease to be shiny and pink. Under dim conditions, the self-light is too much to see that reflection, but under bright conditions, it's still obvious that it is shiny. So, too, you can have electronic equipment which is outputting power, yet still reflective.
So, there is an important distinction between a pure resistive match, the dynamic impedance, and the "maximum power" impedance.
The most important, most pedestrian case, is an audio power amplifier: the amplifier is designed to achieve maximum power output into a 4 or 8 ohm load, but has a dynamic impedance of milliohms. Matching to the milliohm value would indeed maximize your power output for a given output voltage (say, a millivolt), but the amplifier is limited to a few amperes before it ceases to be a linear source, so you'd only get milliwatts.
Amplifiers can also be designed for very high output impedances, in which case they resemble current sources; but again, too high a load resistance and, in this case, the source will run out of voltage before delivering much power.
Tim