TCP vs UDP: How WhatsApp Actually Works! ? #shorts
Ever wondered why your WhatsApp texts always arrive perfectly but voice calls sometimes glitch? In this short, we break down TCP vs UDP using WhatsApp as a real-world example. You'll learn how the 3-way handshake works (SYN, SYN-ACK, ACK), why TCP guarantees reliable, in-order delivery for chats, and why WhatsApp deliberately uses UDP with SRTP for voice and video calls to avoid head-of-line blocking. Plus, the truth about TCP vs UDP and security that most people get wrong.
Perfect for system design interview prep, CS students, and backend engineers.
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