I found the Tool on the above link. It is helpful to calculate subnets and supernets, and it gives more details.
** If I understanding Subnetting a network gives better performance. However I would like to know the strategy of subnetting, I mean based on what objective should I subnet my Network, or just leave a large Network.
some Administrators they say Subnets should map physical location of resources and Vlans.
For instance if I have many locations , each location should have a separate subnet from other locations..That makes sense.
Let 's say I have 5000 users in 5 separate physical locations linked by WAN mediums...
300 users in location1, 1000 in location2, 700 in location3, 400 in location4, and 2600 users in location5(Corporate office)
At this point is the IP address class (A,B,C) is more important than the Mask for example (/19 )
I chose /19 because it gives 8190 hosts for whatever class I chose...
My point is how do I determine the number of subnets that will be in each location, and will satisfy the number of hosts (5000 users).
Any help will be very much appreciated