Socket programming is just teaching computers to talk to each other, like setting up a phone call between servers. TCP congestion is the network telling us to slow down when the digital highway is too busy, and packet capture is like listening in on that conversation with a tool like Wireshark. Honestly, for most Indian students, we mug up the diagrams for exams, but you only *get* it when you build a simple chat app for your college fest and see the packets flow... or fail. My own project to send sensor data from our terrace garden to my phone made these dry terms come alive with all the 'connection timed out' errors!
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