TCP vs UDP: Which Protocol Should You Use? (System Design Interview)
Every time your app opens a new connection, you pay a "latency tax" of at least 56ms. For high-performance systems, this is unacceptable. Learn the senior engineering secrets to bypassing this limit.
High-Performance Browser Networking || Chapter Summarized
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The Summary
In this deep dive into TCP/IP Internals (Chapter 2 of High Performance Browser Networking), we dissect the protocol that powers the internet. We explain why the "Three-Way Handshake" is a hidden bottleneck, how "Slow Start" throttles your bandwidth even on gigabit fiber, and why "Head-of-Line Blocking" makes TCP terrible for real-time gaming. You'll also learn advanced Linux kernel tuning secrets like TCP Fast Open, Window Scaling, and Congestion Control algorithms (CUBIC vs BBR) to squeeze every millisecond out of your backend.
What You Will Learn
The 3-Way Handshake: Why it costs 1 RTT and how TCP Fast Open cheats this rule.
Flow Control vs. Congestion Control: The difference between "Receivers" and "Networks" saying stop.
Slow Start: Why new connections are artificially slow and how Initial Congestion Window (IW10) fixes it.
Head-of-Line Blocking: The fatal flaw of TCP reliability and when to switch to UDP.
Linux Tuning Secrets: How to enable Window Scaling and disable Slow-Start Restart for massive speedups.
System Design Pattern: Why "Connection Pooling" is non-negotiable for microservices.
Target Audience
Backend Engineers, DevOps Professionals, SREs, and System Design Interview candidates who want to move beyond "it just works" to "it works perfectly."
3. SEO Tags & Category
Keywords
tcp vs udp differences, tcp handshake explained, tcp slow start algorithm, tcp fast open linux, tcp window scaling, tcp congestion control cubic vs bbr, head of line blocking tcp, udp for gaming, system design interview networking, backend performance tuning, linux kernel tcp tuning, connection pooling explained, http keepalive, packet loss performance, bandwidth delay product
Hashtags
#SystemDesign #Networking #BackendEngineering #LinuxTuning #TCP
YouTube Category
Science & Technology