How many characters per second can be transmitted over a 4800-baud line in each of the following modes? (Assume a character code of eight bits.) a. Synchronous serial transmission. Also draw timing diagram. b. Asynchronous serial transmission with two stop bits. Draw timing diagram c. Asynchronous serial transmission with one stop bit. Draw timing diagram.

What exactly is the difference between multiplexing and demultiplexing?

3. A binary sequence, 01...., formatted using bipolar-AMI is transmitted over a noisy channel. The received waveform that contains an error is shown below. Locate the position of this error and identify the transmitted data bit pattern. 1

Assume that we have a 4-bit ALU. List the inputs and outputs in binary for the ALU if we are using it to determine the subtraction of A = 6 10 and B = 7 10 · Note that ALU operation is 102. Input: a = (dotsdots) b = (dotsdots) Output: Zero = (C) Result _) Overflow = (C) 7. Assume that we have a 4-bit ALU. List the inputs and outputs in binary for the ALU if we are using it to determine the subtraction of A = 610 and B=710. Note that ALU operation is 102. ALU operation ALU Zero Result Overflow Input: a=(...) b=() Output: Zero = (-) Result () = Overflow=(-)

What is the purpose of error and flow control in synchronous time-division multiplexing, and how is it implemented?