Chapter 5. Solution design 107
For ABBC we set the parameter to 60 seconds. Effectively this forces the
posture status to refresh itself at every challenge. Figure 5-8 shows the
conceptual control flow for this parameter.
Figure 5-8 MAX_DATA_AGE_SECS conceptual flow
Client challenge
issued by network
access device
Posture
Cache
Is the cache
data more
recent than
MAX_DATA_AGE_SECS
parameter?
Run Posture
Collectors
No
Yes
Return cached
data
Refresh Cached Data
Response sent
to network
Network Access Device