Exam 300-710 topic 1 question 194 discussion

it seems FDM started supporting HA in 6.3, I can't find HA mentioned in 6.2.3, so the key here is the version. For FMC setups running 6.2.3 it is supported, so A looks to be correct here. https://www.cisco.com/c/en/us/td/docs/security/firepower/623/fdm/fptd-fdm-config-guide-623.html https://www.cisco.com/c/en/us/td/docs/security/firepower/630/fdm/fptd-fdm-config-guide-630/fptd-fdm-ha.html https://www.cisco.com/c/en/us/td/docs/security/firepower/623/configuration/guide/fpmc-config-guide-v623/firepower_threat_defense_high_availability.html

This are the req for HA on 6.2.3 (they need to be part of FMC) Software Requirements The two units in a High Availability configuration must: Be in the same firewall mode (routed or transparent). Have the same software version. Be in the same domain or group on the FMC. Have the same NTP configuration. See Configure NTP Time Synchronization for Threat Defense. Be fully deployed on the FMC with no uncommitted changes. Not have DHCP or PPPoE configured in any of their interfaces. (Firepower 9300) Have the same flow offload mode, either both enabled or both disabled.

I'd go with A, because all other are just wtf

changing from Cisco FDM management to Cisco FMC management on both devices and registering them to FMC, is necessary to configure high availability between two Cisco FTD devices in a deployment where they are being managed by Cisco FMC. When using Cisco FMC to manage the Cisco FTD devices, both devices must be managed by Cisco FMC before configuring high availability. This involves changing the devices from local management (Cisco FDM) to central management (Cisco FMC) and registering them to Cisco FMC. Correct answer:A Therefore, to ensure that the environment is ready to pair the new Cisco FTD with the old one, the correct action is to change from Cisco FDM management to Cisco FMC management on both devices and register them to FMC.

I can't figure out a single one of these answers that makes sense. HA is supported in FDM (https://www.cisco.com/c/en/us/td/docs/security/firepower/640/fdm/fptd-fdm-config-guide-640/fptd-fdm-ha.html) without an FMC, so not "A". I can't imagine why you'd use a Class B for Failover links so not "B". You shouldn't need to factory reset the primary to configure a secondary so not "C". And DNS doesn't need to be the same configuration so not "D". HA in FDM was a recent(ish) addition so maybe that's the one they mean?