I don't have time to answer all of your questions, but in regards of your last post, if I'm not mistaken a VPS (Virtual private server) is simply a server that runs along with a few more other virtual servers which themselves run on the same machine.
A dedicated server is basically a machine which is not shared with anybody else, that is your server is the only server that runs there.
Feel free to correct me if I'm wrong by the way.
In your case, if you are just starting out, then I suggest sticking with VPS as they tend to be a lot cheaper than dedicated servers, and then upgrade when your VPS starts choking.
RAM - place where recently accessed data goes, in their case "RAM" is the default the server comes in, and MAX RAM is the limit of how much the motherboard supports.
CPU is basically responsible for all the calculations. To simplify it for you, more cores = faster processor.
Processor type is to distinguish between pentium 4, and quad core, as some p4's work at higher frequencies, (3.5GHZ) but work a lot slower than quad and dual cores that work at half the frequency.
A dedicated server is basically a machine which is not shared with anybody else, that is your server is the only server that runs there.
Feel free to correct me if I'm wrong by the way.
In your case, if you are just starting out, then I suggest sticking with VPS as they tend to be a lot cheaper than dedicated servers, and then upgrade when your VPS starts choking.
RAM - place where recently accessed data goes, in their case "RAM" is the default the server comes in, and MAX RAM is the limit of how much the motherboard supports.
CPU is basically responsible for all the calculations. To simplify it for you, more cores = faster processor.
Processor type is to distinguish between pentium 4, and quad core, as some p4's work at higher frequencies, (3.5GHZ) but work a lot slower than quad and dual cores that work at half the frequency.