NetSec Visualized

Networking & security, animated

Learn how networking and security actually work.

NetSec Visualized turns the invisible machinery behind the internet into animations you can watch move. Free study packs, hands-on projects on GitHub, and short episodes that make Network+, Security+, and CCNA concepts click. Built in the open, growing into a community.

Watch on YouTube Get the study packs

Study materials

Free study packs. No signup.

Every episode ships a study pack you can download right here, no email required. Here is the one for Episode 001.

Episode 001

What Actually Happens When You Hit Enter

  • Net+
  • Sec+
  • CCNA
Study guide.pdf · 17 pages Cheat sheet.pdf · 1 page Flashcards.pdf Anki deck.csv

More packs land with every new episode.

About

More than a channel.

NetSec Visualized animates how networking and security actually work. No slides, just the mechanism in motion. The episodes are only the start: the study packs are free, the example projects are open on GitHub, and the whole thing is growing into a community for people who want to really understand how the internet works, not just pass an exam.

Hands-on

Go from watching to building.

Seeing the mechanism is one thing. Poking at it yourself is another. Our GitHub holds the animation source and small, self-contained projects you can clone and run, so you can take the concepts off the screen and into your own terminal.

github.com/NetSec-Visualized

Animation source, study-pack generators, and runnable mini-projects. Open and free.

Explore the projects

Roadmap

Where this is going.

One episode at a time, each cracking open a single protocol or mechanism, each with a free study pack. Mapped to Network+, Security+, and CCNA, never a textbook.

  1. 001What Actually Happens When You Hit EnterLIVE
  2. 002How a packet travels across the internetnext
  3. 003The TCP three-way handshake, and why it exists
  4. 004How DNS resolves a name
  5. 005Subnetting, made visual
  6. 006How HTTPS and TLS really work

Then a growing library: a cheat sheet and flashcards per episode, then objective-by-objective guides mapped to the Net+, Sec+, and CCNA blueprints. A watch-plus-study path for each cert.

See the whole slate (30 episodes)

Tier 1 · flagship launch

  1. What happens when you type a URL and press Enter
  2. How a packet travels across the internet
  3. The TCP 3-way handshake, and why it exists
  4. How DNS resolves a name (recursive vs iterative)
  5. Subnetting made visual (/24 to /26)
  6. How HTTPS/TLS works, and what the lock really means
  7. The OSI model, practically (watch encapsulation happen)
  8. NAT: how your whole house shares one IP
  9. How a VPN actually works (tunnel + encryption)
  10. Public vs private keys, explained with locks

Tier 2 · intermediate, first attacks

  1. Certificates & CAs: the chain of trust
  2. ARP, and how ARP spoofing hijacks it
  3. How a stateful firewall decides allow/block
  4. DHCP: how a device gets its IP (DORA)
  5. SYN floods and how DDoS works
  6. Symmetric vs asymmetric, and why TLS uses both
  7. Hashing & salting, and why passwords aren't stored
  8. Man-in-the-middle attacks, visualized
  9. OAuth 2.0 / "Sign in with Google", the token dance
  10. VLANs: segmenting one switch into many networks

Tier 3 · deeper, still practical

  1. BGP: how the internet picks routes
  2. TLS 1.3 vs 1.2: how the handshake got faster
  3. Zero Trust architecture
  4. How a buffer overflow works (the stack, animated)
  5. DNS cache poisoning
  6. Routing vs switching (L2 vs L3)
  7. How a load balancer spreads traffic
  8. Ports & sockets: one server, many connections
  9. How passwords get cracked (brute force to rainbow tables)
  10. How EDR/XDR spots a threat