Some important things & facts you should know
Server = a PC which runs a server program (OR the server : program itself)
Hosting a CS2D server = creating your own CS2D game and be admin
Admin (administrator) = a person who can control all server settings etc.
RCon (remote control)= allows you to be an admin on other servers
RCon Password = password required to be able to control other CS2D servers
Console = a text input/output interface where you can enter commands