Answer:
Memory-mapped I/O and port-mapped I/O are two complementary methods of performing input/output between the central processing unit and peripheral devices in a computer. An alternative approach is using dedicated I/O processors, commonly known as channels on mainframe computers, which execute their own instructions. 
 
        
             
        
        
        
Explanation:
We can divide the multiplex in different categorize, for example:
- FREQUENCY DIVISION MULTIPLEXERS (FDM)
- 
TIME DIVISION MULTIPLEXERS (TDM)
- 
STATISTICAL TIME DIVISION MULTIPLEXERS (STDM).
But in this case, we're going to explain about the time and frequency, because the time division multiplex differ to frequency, because the circuit is divided horizontally, and the time is vertically
b. splits the communication circuit vertically (with time slots) instead of horizontally
 
        
             
        
        
        
Answer:
D. all of the above
Explanation:
Contemporary Information Systems are interfacing with customers andsuppliers using, electronic commerce, CRM, and SCM.
 
        
             
        
        
        
Answer:
The length in kilometers is equal to the meters divided by 1,000.
Explanation:
The length in kilometers is equal to the meters divided by 1,000.
 
        
                    
             
        
        
        
ICS would bet he answer. 
Good luck! (: