Resolution:
Description:
= = = = = = =
In the following iniftst example,

Hostname:     xxxxxx
IP address:   10.241.23.111
Rev IP name:  NNNNNN

Interface   Address   Netmask   Network   Broadcst
----------  --------  --------  --------  --------
IP00        0af11771  ffffff00  0af11700  0af117ff
IP01        c0a8186f  ffffff00  c0a81800  c0a818ff
IP02        c0a8176f  ffffff00  c0a81700  c0a817ff
IP03        0af16068  fffffe00  0af16000  0af161ff
IP04        0af1176f  ffffff00  0af11700  0af117ff
loopback    7f000001  ff000000  7f000000  7f000001

IP00        10.241.23.113
IP01       192.168.23.113
IP02       192.168.23.111
IP03       10.241.96.104
IP04       10.241.23.111

Here there are two network cards in the same subnet -- 10.241.23.111 and 10.241.23.113.

1). When the network specification is NULL, the default address/interface is used (10.241.23.111).

2). If the network specification is not NULL we use the network specification provided. In the case that the network specification is 10.241.23.0, which is basically asking for an interface to the 10.241.23 network of which there are 2 in the table. If you look at the preceeding output you will notice in the interface that 10.241.23.113 is ahead of 10.241.23.111 in the table, so  10.241.23.113 will be used.

3). If IP04 is specified then 10.241.23.111 will be used.