Using NLB over Application Server in SharePoint 2010?

I have two application server that I need to load balance using Microsoft NLB.

My queries:

1) Just load balancing the Application Server will load balance the SharePoint service as well?  

2) How would service application on application server would response to the request that is coming via VIP,  what I want ask is where in IIS the physical ips be configured?

3) Once I configure the NLB and have VIP pointing to two physical IPs, how would the Web Server knows that he has to send the request over the VIP(virtual ip) . Where is this configuration done?