You are piloting the deployment of a SharePoint Server 2010 Service Pack 1 (SP1) server farm named
Farm1. Farm1 contains two front-end Web servers and an application server. You create a new site
collection that contains five sites. You need to simulate 200 user connections to the sites. The
solution must use the minimum amount of administrative effort. Which tool should use?

A.
Stsadm

B.
Microsoft SharePoint Designer

C.
Test-Connection

D.
Microsoft Visual Studio

Explanation:
To determine how well your software responds to various levels of usage, you conduct load tests. A
load test models the expected usage of a software program by simulating multiple users who access
the program at the same time.

http://msdn.microsoft.com/en-us/library/dd293540.aspx