ip addressing in freebsd

[niraj kumar]

1. in freebsd we can have two ip address for a single host like 2.0.0.1 & 17.0.0.1 by using ifconfig but why can't we assign two ip like 2.0.0.1 & 2.0.0.2 (i  know that both r in same network)
2 so where is the problem in resolving the ip addressing of the host 
3 where i can find more about this (links)
 
4. where is the code of the ip resolution in the    kernel                             
                          niraj  
                                   

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