phranque - 1:07 pm on Nov 9, 2012 (gmt 0)
welcome to WebmasterWorld, Kenneth!
i'm not sure what v5.5 is but your apache should be a version of 2.0, 2.2 or 2.4 - but this shouldn't matter as far as your question is concerned.
within your <VirtualHost> context you would typically set your hostname for the virtual host using the ServerName directive.
you can also specify one or more alternate hostnames within that <VirtualHost> context using the ServerAlias directive.
if you do this you should pick one of those hostnames to be the canonical hostname and 301 redirect all non-canonical URLs requested to the canonical hostname.
Name-based Virtual Host Support - Apache HTTP Server: