Thanks for replying. That is the same information that I found in the guide. It is still confusing to me though, because the way it is written could be interpreted in a few different ways.
For example, the doc could be telling us that vCD or vCAC is needed as an endpoint, but it does not clearly state that vCD is required to host the vFabric Application Director vAPP. I think the doc does mention that requirement further down, however it is still not perfectly clear.
I could see a situation where the doc might have been written for vCD before Dynamic Ops was acquired, so VMware might push you toward using vCD.
Thanks again for the reply.
Drew