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Why the call does not get in, why it drops, and why it is slow — told apart on evidence, with the denominator checked before the verdict.

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Telecom Foundations

TCP vs UDP

interactive2 min

Lesson 18 of 24

Card 1 of 617%

Warm-up: Guess before you learn

Try these first, even if you're not sure. Guessing primes your brain.

A movie downloads over a flaky link but plays perfectly. How?

A video call glitches instead of pausing to resend audio. Why?

Why do TCP connections start with a handshake?

Answer all 3to continue — it's OK to be wrong.

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