7
                           
                           
                              
                           
                           
                           
                           
                                                      
                           
                  
                  
                  
                           
                                                                                 
                           
                              
                                                            
                                 
                                 
                                 
                              
                           
                           
                           
                           
                           
                        
                        
                     
                              Q:
                           
                           
                                                      | A) 7 usable subnets, each with 32 host addresses | B) 8 usable subnets, each with 30 host addresses | 
| C) 8 usable subnets, each with 27 host addresses | D) 7 usable subnets, each with 24 host addresses | 
                              Answer:   B) 8 usable subnets, each with 30 host addresses
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
Because subnet zero is configured and we have a class C address (192.168.100.0) then the network portion will have 3 bits so 8 subnets will be available. The rest of the bits, 5, represent the available hosts, so 2^5=32, but only 30 are available, 0 ad 31 are network and broadcast respectively.
                            
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