I was working on SCCM2012 design for a small environment and wanted to figure out if I need to incorporate CAS ( Central Administration Site ) in the design. Initially I was assuming that CAS will provide HA in the environment, but I was wrong . CAS is only required when we want to manage 100K+ clients and when we have multiple primary sites. For a relatively small environment, people are recommending to go with stand alone primary site.
Here are some links for a good reference on CAS:
Here are some links for a good reference on CAS: