When my application server connect to our sql server, I use port explorer to monitor the port activity. I noticed my app connect to db server in two different ways:
1. 0.0.0.0:2825 192.100.10.100:2003
2. 192.100.10.20:2927 192.100.10.100:2003
where 192.100.10.100 is the sql server...