Which of the following applies to a DNS caching server? (Choose all that apply.)
       
      
                
     
    
    
    
    
    1 answer:
            
              
              
                
                
Answer:
The answers are:  it is used to enable fast DNS queries and  It can help reduce the amount of network traffic generated by DNS servers.
Explanation:
Because a DNS server can resolve a query from tis local data sends a recursive qyery to a root server.
 
                                
             
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Answer:It will decrease harmful emissions, so the factories will no longer need to install them.
Explanation:
This helps improve the safety of the surrounding community and workers. But this technology is expensive and required time and effort to install.