Basic or more like "fundamental" question I guess:
So if I got that right, each time someone runs Geth/Parity or other software they all become part of the EVM (ethereum virtual machine). However once you run this on port 8545 it's all mainnet...or maybe not?
Which still leads to my question: who confirms transactions on say Ropsten? Currrently I am sending many "succesfull" transaction to Ropsten contracts and I wait a few seconds for confirmation as if this is a real transfer occuring on the blockchain (mainnnet) but I am curious is this really done by miners using Geth or is it just fake time-waiting to appear as if someone really confirms those? Thanks!