Ha, rednecks are from another galaxy far, far away from him I'd bet (silicon valley). Grunt, if you’re dealing with rednecks that can't comprehend, why are you trying to explain technical terminology? Wouldn't the logical route be, hey Billy, I'm going to try and make your computer better, let's flip a coin. This heads or tails will decide what "Brand-name-software-firewall" we'll be using today. Assuming you'll be using a free "Brand-name-software-firewall", flip a coin they're all pretty much the same. [joke];) Not that you care.
Yup, Sure do. A firewall is this thing that helps keep things out of your computer. That about half of what I try to get through to people... I really don't think that requires touching on different types of firewalls? Correct me if I'm wrong and you've worked with more rednecks than I have, but they don't have the greatest attention span for much of anything technical.
I'm going out on a limb here and saying that would likely be (SPI)? Not that you care.
For these folks, It's how many computers/devices you have. If you have more than computer, or device that needs/wants interenet, you should go with a router, which doubles as a hardware firewall, so that you don't have to buy a firewall for each device, and so that you don't have to buy a hub.
If them and you "could careless", why are you trying to explain past "Billy I'm going to try a make your computer better"?
Does it really freaking matter? I'm trying to get SOMETHING put on their computer to reduce the number of bots, zombies, worms, etc. I could care less, they could care less.