There is a growing list of links and paths that can be used for testing purposes.  Let me summarize them here, assuming that the folder is called Site1 and the Folder Targets are also given the same name.

Using the DFS path directly: (DFS level)
   \\domain\webfarm\Site1

Accessing directly using the first namespace server: (namespace level)
   \\namespaceserver1\webfarm\Site1

Accessing directly using the second namespace server: (namespace level)
   \\namespaceserver2\webfarm\Site1

Accessing content directly on primary server without using DFS: (folder target level)
   \\contentserver1\Site1

Accessing content directly on second server without using DFS: (folder target level)
   \\contentserver2\Site1

Notice that it is the DFS path (\\domain\webfarm\Site1) which will be used on the web servers and for most usages.  It will always be the same, regardless if the namespace or target folder changes over time. The other paths are for testing and troubleshooting and could change over time.