标签：nlb
可参考：
http://www.iis.net/learn/extensions/configuring-application-request-routing-(arr)/achieving-high-availability-and-scalability-arr-and-nlb
http://543925535.blog.51cto.com/639838/307779/
NLB负载均衡
原文地址：http://itisforyou.blog.51cto.com/9778869/1620998
