Answer:
Custom application partition.
Step-by-step explanation:
The user has several DNS servers identified as csmpub.local which still contain the following region. These of that same DNS servers seem to be on the website in Chicago, which is linked to three certain websites via a bandwidth-limited WAN connection.
Just Chicago website clients require connection to the information well into the csmpub.local area. However, csmpub.local area would be stored in Custom application partition.