RobotnixAcademy

Week 18 · lesson

Checkpoint 6: Cybersecurity I Defensive Systems Portfolio

This is the final GSC I mastery checkpoint.

You will combine two different evidence sources:

  1. the Week 17 synthetic local packet capture, which proves specific ARP/TCP/HTTP observations; and
  2. the Week 18 topology/fault simulator and supplied architecture facts, which support routed-path and failure reasoning.

Do not treat a topology prediction as packet evidence, and do not claim that the local capture proves a remote routed path.

Submit

Your final portfolio must include:

  • system/path diagram;
  • clear labels showing which claims come from the packet capture and which come from the topology model;
  • ARP evidence explanation with packet numbers;
  • TCP three-way-handshake timeline with packet numbers;
  • one layered packet annotation;
  • six-control defensive security map with asset, CIA property, failure reduced, and limitation;
  • one teacher-provided fault/failure analysis;
  • five earlier course artifacts showing growth across the semester;
  • five-minute architecture-defense outline.

At least one earlier artifact must come from each area:

  • ethics/authentication/human factor;
  • systems/hardening/IoT;
  • binary/cryptography/steganography;
  • command line;
  • networking/packet analysis.

Defense question

Your oral/written defense must be able to answer:

  1. What does the local capture actually prove?
  2. What does the topology model add that the capture does not?
  3. Why are MAC and IP addresses both needed in the model?
  4. What does the TCP handshake establish?
  5. Which defensive control matters most in your design and why?
  6. What additional evidence would you need before calling an observed event malicious?

Scoring

This is a teacher-reviewed mastery checkpoint.

The common GSC I rubric scores five areas from 0-4:

  • technical accuracy
  • evidence quality and reproducibility
  • reasoning and trade-offs
  • safety and authorization
  • communication

Maximum: 20 points.

The Robotnix mastery target is 15/20 or higher with no criterion below 2. If the evidence is incomplete or a claim reaches beyond what the evidence supports, revise and resubmit.