You are a consultant. You have been called in to troubleshoot a malfunctioning NLB cluster that is
supposed to serve Web pages with IIS. The cluster contains four hosts, but only one host at a time
will successfully form the cluster. Clients appear to have no problems connecting to any of the
single-host cluster configurations. What is the most likely cause of the problem?

A.
The hosts are configured with duplicate priorities.

B.
The hosts are configured with different port rules.

C.
The hosts are configured with different cluster IP addresses.

D.
The hosts are configured with duplicate cluster IP addresses.