Your network consists of a single Active Directory domain. All servers run Windows Server 2008 R2. Youplan
to publish a Web site on two Web servers.
You need to deploy an availability solution for your Web servers that meets the following requirements:
Supports the addition of more Web servers without interrupting client connections.
Ensures that the Web site is accessible even if a single server fails.
What should you do?

A.
Configure a failover cluster.

B.
Configure a Web garden on each Web server.

C.
Create a Network Load Balancing cluster.

D.
Create two application pools on each Web server.

Explanation:
High availability for web-based application requires Network Load Balancing (NLB) Clustering, which is
available in all editions of Windows Server 2008 and 2008 R2.
MS Self-Paced Training Kit 70-646 (2nd Edition), p.520