segmentation
Devices interpret subnetting information on a LAN by determining where the traffic originated and routing it to the appropriate area. By creating subnets, it is possible to have segregated areas of a network.
There is no need to use subnetting if you have no wish to further divide up your network into smaller, logical networks.
Loose of ip address
Yes. Subnetting separates a network into multiple logically defined segments, or subnets.
one number of host bits must be left when you doing subnetting.
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Summary: A subnet mask is a way of telling your computer or router what network addresses it can consider local and which are remote.mcsgul@yahoo.com
Subnetting is the practice of dividing a network into two or more networks.
172.16.1.0 24
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Subnetting allows you to create multiple local networks within a network. For more details use this site: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800a67f5.shtml