Day 2 — Journey to Becoming a Complete Full-Stack Developer (2026 Edition) 🚀
Starting from absolute beginner → professional engineer in 1 year.
Phase 0: Foundation
Still focused on understanding how the internet works before writing code.
Today’s Focus: DNS Deep Dive & TCP Basics 🌐
Here’s what I learned today:
🔹 DNS Record Types
Understanding how different DNS records function:
- A – Maps a domain to an IPv4 address
- AAAA – Maps a domain to an IPv6 address
- CNAME – Alias for another domain
- MX – Handles email routing
- TXT – Stores text data (often for verification/security)
- NS – Specifies authoritative name servers
🔹 TTL (Time To Live)
- The amount of time (in seconds) a DNS record is cached
- Helps reduce load and speed up requests
- Short TTL = more fresh data, longer TTL = better performance
🔹 TCP Connection (3-Way Handshake)
How devices establish a reliable connection:
- SYN → Client initiates connection
- SYN-ACK → Server acknowledges
- ACK → Client confirms
This is what happens before actual data starts flowing.
What’s Next (Day 3)
- HTTP vs HTTPS
- Request/Response cycle
- Status codes
I’m documenting everything as I learn. Follow along or check out my roadmap:
👉 https://github.com/JstKiraOfficials/Complete-Full-Stack-Developer-Roadmap
Consistency over intensity. See you on Day 3. 💪
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