Flash storage of proxy_client of mesh-sdk-2.1.1

Hi Nordic experts:

I want to know more exactly about the flash usage of the proxy_client example of mesh-sdk-2.1.1, 

As I dig down the source code so far, I find there is "NET_FLASH_PAGE_COUNT=1" and "DSM_FLASH_PAGE_COUNT=1" definition when PERSISTENT_STORAGE is enable.

They are at 0x7F000 and 0x7D000 separately.

Could any one share which parameters are store in these two pages?

Besides, Are there any other pages used for other purpose? (maybe for application-layer parameters storage...., etc)