Use network exposure to support the argument
For network exposure, evidence should be selected before writing the conclusion. Record the observation, identify the relevant context, then explain what the observation can and cannot prove. This avoids overclaiming and gives the iot security report a more defensible academic tone.
Where possible, compare the expected state with the observed state. For iot security, that comparison gives the reader a clear basis for judging whether the control, configuration, artefact or result is acceptable.
Show why secure updates changes the conclusion
Students often lose marks by describing secure updates without evaluating it. A better approach is to compare the expected behaviour with the observed behaviour, identify the security consequence, and justify the next control or investigative step. That sequence keeps the discussion specific to iot security.
A useful discussion also acknowledges constraints. Time, available evidence, lab scope, legal boundaries and incomplete data can all limit what can be concluded about MQTT risk or physical access.