Comprehensive and Detailed Explanation From Exact Extract of Forescout Platform Administration and Deployment:
According to the Forescout Administration Guide - Policy Processing, when an admission event occurs, "Main rules process concurrently, sub-rules process sequentially".
Policy Processing Flow:
According to the Main Rule Advanced Options documentation:
When an admission event triggers policy evaluation:
Main Rules - Process concurrently/in parallel
All main rules are evaluated simultaneously
No ordering or sequencing
Each main rule evaluates independently
Sub-Rules - Process sequentially/in order
Sub-rules within each main rule execute one after another
First match wins - stops evaluating subsequent sub-rules
Order matters for sub-rule execution
Main Rule Concurrent Processing:
According to the documentation:
"Main rules are evaluated independently and concurrently. Multiple main rules can be processed simultaneously for the same endpoint."
Sub-Rule Sequential Processing:
According to the Defining Policy Sub-Rules documentation:
"Sub-rules are evaluated sequentially in the order defined. When an endpoint matches a sub-rule, that sub-rule's actions are taken and subsequent sub-rules are not evaluated."
Example Processing:
When admission event triggers:
text
CONCURRENT (Main Rules):
├─ Main Rule 1 evaluation → Sub-rule processing (sequential)
├─ Main Rule 2 evaluation → Sub-rule processing (sequential)
└─ Main Rule 3 evaluation → Sub-rule processing (sequential)
(All main rules evaluate at the same time)
Why Other Options Are Incorrect:
B. Parallel/Concurrently - "Concurrent" and "parallel" mean the same thing; sub-rules don't process concurrently
C. Concurrent/Parallel - Sub-rules don't process in parallel; they're sequential
D. Sequential/Concurrently - Main rules don't process sequentially; they're concurrent
E. Sequential/Parallel - Main rules don't process sequentially; they're concurrent
Referenced Documentation:
Main Rule Advanced Options
Defining Policy Sub-Rules
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