AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 250

You need to find the MTU used by another instance, but tracepath is not working. You know the instance you are trying to tracepath has open security group and
NACL rules. Which protocol do you need to allow to access your instance to remedy this?

Answer options

Correct answer: D

Explanation

The correct answer is D, Protocol 1: ICMP, as it is essential for the tracepath command to operate. The other protocols (TCP, GRE, and UDP) do not facilitate the same level of connectivity for MTU discovery as ICMP does.