Answer: Preamble 
Explanation:
  Preamble is a 7- octet pattern of alternating the 0's and 1's and it allow devices in the network to easily synchronized the receiver clock. It also provide the bit level synchronization. 
It basically allow the start of frame delimiter to provide the byte synchronization and assign a new frame. The bits are transmit orderly from left to right in the frame.  
 
        
             
        
        
        
Answer: A user authentication
 
        
             
        
        
        
Answer:
Brenda works for the IRS reviewing paperwork.
Jenny reviews buildings to determine how much money they are worth
Kareem advises businesses to make sure they handle their finances correctly.
Explanation:
 
        
                    
             
        
        
        
Answer:
. . . . . . . S H A W T Y.. . .. . . 
 
        
             
        
        
        
Answer:
5 hours 25 minutes
Explanation:
It takes 25 minutes to finish a hole
It takes 25*13 minutes to finish 13 holes
325 minutes is require to finish 13 holes
Convert 325 minutes to hours and minutes by dividing it by 60
=5 5/12 hours
Convert 5/12 hours to minutes by multiplying by 60
=25 minutes
The answer is 5 hours 25 minutes