public static void main(String args[]){
        int op;
        do{
            System.out.println("\n\n1- Agregar Servidor");
            System.out.println("2- Agregar Entry");
            System.out.println("3- Navegar");
            System.out.println("4- Ver Detalle");
            System.out.println("5- Consultar DNS");
            System.out.println("6- Salir");
            System.out.print("Escoja Opcion: ");
            op = lea.nextInt();
            
            try{
                switch( op ){
                    case 1:
                        System.out.println("Ingrese tipo servidor HTTP o DNS: ");
                        agregarServidor( TipoProtocolo.valueOf(lea.next()) );
                        break;
                    case 2:
                        System.out.println("Ingrese el Numero IP: ");
                        agregarEntry( lea.next() );
                        break;
                    case 3:
                        System.out.print("URL: http:\\\\");
                        navegar( lea.next() );
                        break;
                    case 4:
                        System.out.println("Ingrese tipo servidor HTTP o DNS: ");
                        detalles( TipoProtocolo.valueOf(lea.next()) );
                        break;
                    case 5:
                        System.out.println("Ingrese Url o ip: ");
                        consultaDNS( lea.next() );
                }
            }
            catch(Exception e){
                System.out.println("Error: " + e.getMessage());
            }
        }while( op!= 6 );
    }