What is an optimal water temperature to pour over the coffee ?

How hot should be the water for pouring over the coffee ? How many degrees celsius are optimal for making coffee ?

According to some people, to make a coffee you should use the water with temperature between 90 and 96 degrees celsius / 195 and 205 degrees fahrenheit. Pouring a coffee with boiling water can scald it, what will make your drink taste a bit bitter and burnt.