The first step would be knowing the manufacturer s recommended schedule for maintenance
        
             
        
        
        
Answer:
d.) Service-Oriented Architecture 
Explanation:
Because its definition matches
 
        
             
        
        
        
a measure of the number of spermatozoa per ejaculation or per measured amount of semen, used as an indication of a man's fertility.
 
        
                    
             
        
        
        
Answer:
Did you mean layer 3 switch? Because a router always operates at layer 3
Explanation:
If the answer is yes, then a layer 3 is a switch that combines the functions of a switch and a router. So it is capable of operate layer 2 and layer 3. Some of its benefits are: Support routing between VLAN, decrease network latency because the packets don’t have to make extra hops to go through a router and reduce security management. But they are really expensive and lack of WAN functionality so they are used mostly for large intranet environments.