Networking for Humans — Tour Map

Start here any time you feel lost. Each module is a stop on the tour — click, learn the mental model, then keep moving.

This series is designed to fully support CompTIA Network+ concepts — but explained through a single, consistent mental model. Think of networking like going on tour: gear, crew, venues, routes, security, and what happens when something breaks mid-show.

CTRL+Strum is the hub. These blogs are the source of truth. Each module also has a matching video where we walk through the same ideas visually.

• Module 0
  Welcome to the Tour

  Troubleshooting mindset
• Module 1
  Every Gig, Every Gigabyte

  OSI & TCP/IP
• Module 2
  The Wires & Waves

  Physical layer
• Module 3
  The Local Crew

  Switching, MAC, VLANs
• Module 4
  Finding the Route

  IP & routing
• Module 5
  Fast vs Reliable

  TCP vs UDP
• Module 6
  The Unsung Heroes

  DNS, DHCP, NAT
• Module 7
  Who's Allowed Backstage

  Firewalls & ACLs
• Module 8
  Show Must Go On

  Troubleshooting tools