Exercise 3: The Three "Getting There" Scenarios — Possible Solution
====================================================================

THE THREE SCENARIOS, PER THIS CHAPTER
------------------------------
1. SSH into a production Linux server (SSH, key-based auth, jump
   hosts — Chapters 2-3).
2. Reaching a Windows server's GUI to run a diagnostic tool (RDP/VNC
   — Chapter 4).
3. Helping a confused end user on their own laptop (screen-sharing
   software — Chapter 5).

WHY THEY'RE GENUINELY DIFFERENT, NOT JUST THREE EXAMPLES OF ONE TASK
------------------------------
Per this chapter, they involve "genuinely different tools, genuinely
different trust models, genuinely different risks." Each uses an
entirely different underlying technology (SSH vs. RDP/VNC vs.
screen-sharing software), not just a different application of the same
mechanism.

THE TRUST-MODEL DIFFERENCE SPECIFICALLY
------------------------------
SSH access to a production server and RDP to a Windows server are both
about a support engineer connecting to infrastructure they're
authorized to administer or diagnose - the "user" of that system is
effectively the system itself. Screen sharing with an end user is
categorically different: there's an actual person present, watching
and potentially still using their own machine during the session,
which is why this chapter positions it as needing "a different trust
model" (previewed for Chapter 5) rather than treating it as just
another remote-access mechanism like the other two.

WHY THIS DISTINCTION MATTERS FOR THE COURSE'S OWN STRUCTURE
------------------------------
Per this chapter, "the capstone applies all three to fresh scenarios of
their own, mirroring this course's own three-part structure directly."
Because the three scenarios are genuinely distinct rather than
variations on one theme, the course (and its capstone) is structured
around covering each one on its own terms, rather than treating one as
representative of all three.

WHY THIS WORKS AS AN ANSWER
------------------------------
It names all three scenarios accurately with their respective tools,
and explains specifically why they differ (different underlying
technology and, for the third, a genuinely different trust model
involving an actual person) rather than treating the distinction as
superficial.