11 Apr
                
                    2009
                
            
            
                11 Apr
                
                '09
                
            
            
            
        
    
                4:13 p.m.
            
        The best protecion is good engineering taking advantage of technologies and architecures available since long time ago at any of the different network layers. Why network operators/carriers don't do it ?, it's another issue and most of the time is a question of bottom line numbers for which there are no engineering solutions. My .02