Analyze hardware/software security defensive capabilities
An adversary can probe a victim's network to determine configurations. The configurations may provide opportunities to route traffic through the network in an undetected or less detectable way. 
Detectable by Common Defenses (Yes/No/Partial): No
Explanation: This can be done offline after the data has been collected.
Difficulty for the Adversary
Easy for the Adversary (Yes/No): Yes
Explanation: Analyze network traffic to determine security filtering policies, packets dropped, etc.
- InfoSec Institute. (2014, June 19). What You Must Know About OS Fingerprinting. Retrieved March 1, 2017.