code:

Address/mask        Class  Net ID              #subs    # hosts
==================  =====  ==================  =======  ========
___.___.___.___/__    _    ___.___.___.___/__  _______  ________

212.47.93.33 /27      C    212.47.93.32 /27      6       30 

     212. 47. 93.0010 0001
     255.255.255.1110 0000
              --|SN|--       <--subnets
               ----|H     |  <--hosts 



42.24.42.24 /28       A    42.24.42.16 /28    1048574    14

      42. 24. 42.0001 1000
     255.255.255.1111 0000
      --|SN          |--    <--subnets
                 ----|H  |  <--hosts 



196.221.212.9 /29     C    196.221.212.8 /29      30     6

     196.221.212.0000 1001
     255.255.255.1111 1000
              --|SN   |--   <--subnets
                  ----|H |  <--hosts 



151.101.38.237 /28    B    151.101.38.224 /28   4096     14

     151.101. 38.1110 1101
     255.255.255.1111 0000
          --|SN     |--     <--subnets
                ----|H   |  <--hosts 

Second, it's with great regret that I must announce I'm going to have to suspend my subnetting practice questions. I'm going to be starting a special project, and simply will not have the time to develop these questions. So rather than try to keep it up and put out shoddy questions, I'm going to put this thread on the shelf for a little while.

For those of you still wanting practice, I encourage you to copy the question above for the format and create your own practice problems (make up IP addresses). Stick with it and you'll get it!