it is good

For Load Balancing in more users access in server.

Scalability

•	Load balances requests for individual TCP/IP 
services across the cluster.
•	Supports up to 32 computers in a single cluster.
•	Load balances multiple server requests, from either 
the same client, or from several clients, across multiple 
hosts in the cluster.
•	Fully pipe-lined implementation ensures high 
performance and low overhead

High Availability

•	Automatically detects and recovers from a failed or 
offline computer.
•	Automatically balances the network load when hosts 
are added or removed.
•	Recovers and redistributes the workload within 10 
seconds.

NLB is used for network load Balancing when there is a heavy
information flow and network traffic. I can also be useful
for applications which intract with users or database.  like
Oracle, SQL, Exchange, etc.

A single computer running Windows can provide a limited 
level of server reliability and scalable 
performance. However, by combining the resources of two or 
more computers running one of the products 
in the Windows Server 2003 family into a single cluster, 
Network Load Balancing can deliver the 
reliability and performance that Web servers and other 
mission-critical servers need.

In a high availability solution where traffic is high.and it also works as a measure of fault tolerance. Like if any Server is going bad then one more will be there to back it up.and if anyone is willing to utilize their network traffic intelligently then they should use Radware Load Balancer or Radware Application Director. It will balance the traffic intelligently between two Servers. Mail servers( exchange front end servers) and webservers should be configured in this way