What Software can be installed on the Cisco 4100 series appliance?
A . FTD
B . ASA
C . ASAv
D . FMC
Answer: A
Explanation:
FTD can be also installed on Firepower 2100, 4100 and 9300 hardware appliances. The Firepower chassis runs its own OS called FXOS while the FTD is installed on a module/blade.
Link: https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-firewalls/212420-configure-firepower-threat-defense-ftd.html