metaquotes mt4 vs broker's mt4

 
Mt4 downloaded from a broker cannot access an account opened by another broker, is it true ?
How about mt4 platform downloaded from Metaquotes site ? Can it access any account from any broker ?
Does Metaquotes supply free-download multi-terminal Mt4 platform ?
 

You want to run the broker's terminal so that the terminal version is supported by the server. The symbols list match the brokers. And other parameters (Digits, Point, MODE_STOPLEVEL, etc) match the broker's specific values.

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