@kodekloud: Why your WhatsApp call lags but your texts never miss a word 👇 WhatsApp runs two protocols at the same time — TCP for chats, UDP for calls. Here's the 60-second breakdown: → Texts use TCP: reliable, ordered, retries on packet loss → Calls use UDP: no handshake, no retries, no ordering — because in a call, flow matters more than perfection → SRTP sits above UDP to track late or missing audio packets → And no — TCP isn't "safer." WhatsApp wraps both in its own encryption + Signal protocol on top. Save this for your next system design interview 🔖 #tcp #udp #systemdesign #networking #whatsapp #coding #programmer #softwareengineer #backend #computerscience #devlife #techreels #interviewprep #computernetworks #protocols #codingreels #engineering #techexplained #learnprogramming #systemdesigninterview

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Thursday 21 May 2026 15:55:00 GMT