Question

Differentiate between parallel port and serial port. Why are they necessary for the computer system?

Answer 1

Explanation:

Difference Between Parallel Port & Serial Port. The main difference between a serial port and a parallel port is that a serial port transmits data one bit after another, while a parallel port transmits all 8 bits of a byte in parallel. Thus a parallel port transmits data much faster than a serial port.

Answer 2

Explanation:

Serial Port:        

• The name “serial” conveys that it is “one by one”        
• “Transmits” data one bit after another    
• “Transmits single stream” of data      
• It serves as an interface        
• Consists of single wire        
• Example: COM  

   

Parallel port :

• The name “parallel” conveys that it is multiple
• “Transmits” all 8 bits in parallel
• Since it transmit bit by bit, serial port are slower      
• Faster when compared to serial port
• “Transmits multiple stream” of data
• Connection between two sub system
• Consists of multiple wires
• Example :printer/LPT port