An issue with parallel data transmission is: The number of transmission paths required. The circuits require more complex circuitry, such as multiplexer and de-multiplexers. None of the above Too slow compared to serial transmission This type of transmission is outdated. The most common numerical formats to reference an ASCII character are: Hexidecimal and Octal. Hexidecimal and Decimal Binary and Octal Decimal and Base64 All of the above