Exam 300-710 topic 1 question 257 discussion

I would also say A. The requirements are "troubleshoot the issue by simulating real DNS traffic" .. this would indicate using optiong A which includes a Trace to simulate the traffic flow.

I think the answer is B, because the question specifically ask, "on the Cisco FTD while verifying the Snort verdict". https://www.cisco.com/c/en/us/support/docs/security/firepower-ngfw/212321-clarify-the-firepower-threat-defense-acc.html#:~:text=Allows%20to%20run%20system%20support%20firewall%2Dengine%2Ddebug%20at%20the%20same%20time%20to%20see%20what%20happens%20within%20the%20Snort%20engine%20itself

It says "simulating" so definitely not A

TCPdump doesn't simulate packets.

A: See reference https://www.cisco.com/c/en/us/support/docs/security/firepower-ngfw/212474-working-with-firepower-threat-defense-f.html

A To trace a real packet is very useful to troubleshoot connectivity issues. It allows you to see all the internal checks that a packet goes through. Add the trace detail keywords and specify the number of packets that you want to be traced. By default, the FTD traces the first 50 ingress packets. In this case, enable capture with trace detail for the first 100 packets that FTD receives on the INSIDE interface: > capture CAPI2 interface INSIDE trace detail trace-count 100 match icmp host 192.168.103.1 host 192.168.101.1