Computer Networks

Every step on this roadmap

5 stages · 9 articles · 18 scenes · 5 quizzes

1. STAGE 01Foundations

   How networks are organised, IP addresses, and routing basics.

   1. ArticleComputer Networks: OSI Model, TCP/IP & HTTP
   2. SceneThe OSI Model in Seven Layers
   3. SceneLatency vs Throughput vs Bandwidth: Why Your Game Still Lags
   4. ArticleIP Addressing, Subnetting & CIDR
   5. SceneSubnet Masks: Where the Network Ends
   6. QuizReadiness Check

2. STAGE 02Transport Layer

   TCP reliability, flow control, and the full lifecycle of a connection.

   1. ArticleTCP: Handshake, Reliability & Congestion Control
   2. SceneTCP Connection Lifecycle
   3. QuizReadiness Check

3. STAGE 03Application Layer

   DNS, HTTP, and the full suite of application-layer protocols.

   1. ArticleDNS: The Internet's Directory Service
   2. SceneDNS: Resolving a Name Hop by Hop
   3. ArticleHTTP & HTTPS: Methods, Headers & TLS
   4. SceneHTTP Methods: What Each One Does to the Data
   5. SceneHTTP Status Codes and What Each One Means for You
   6. SceneConnection Reuse: Why the 2nd Request Is Faster
   7. SceneHTTP to HTTPS: What the Guy on the WiFi Sees
   8. SceneVPN: What It Hides From the Guy on the WiFi
   9. ArticleApplication Protocols: SMTP, FTP, SSH & WebSockets
   10. ScenePolling vs WebSocket: How Your App Hears News
   11. SceneWhy AI Chat Types Word by Word
   12. Scene8 API Styles and the Shape of Each Conversation
   13. SceneSeven Application Protocols, Port by Port
   14. QuizReadiness Check

4. STAGE 04Routing

   How routers learn paths and forward packets across the internet, from static routes to BGP.

   1. ArticleRouting Protocols: RIP, OSPF, BGP & How the Internet Routes
   2. SceneHow a Packet Finds a Road It Was Never Told About
   3. QuizReadiness Check

5. STAGE 05Security & Diagnostics

   Attack techniques, defence mechanisms, and hands-on troubleshooting tools.

   1. ArticleNetwork Security: TLS, Attacks & Defences
   2. SceneTLS 1.3: One Round Trip and a Secret Never Sent
   3. SceneHow CAPTCHA Spots a Bot
   4. SceneFirewall: The Bouncer at Your Server’s Door
   5. ArticleNetwork Troubleshooting: ping, traceroute, Wireshark & tcpdump
   6. QuizReadiness Check

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