The United Nations currently recognizes 180 currencies that are used in 195 countries across the world the United States dollar is a popular currency and about 66 countries either peg their currency to the US dollar or use it as their currency
        
             
        
        
        
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I hope this helps! :)
        
             
        
        
        
A home network aswell business networking would use a Router to connect the lam and internet all together