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// track 01

Networking Fundamentals

From bits and signals to TCP, DNS, TLS 1.3, QUIC, and NAT — read packet captures, debug routing, write transports from scratch.

1 of 12 modules published

  1. 1.7

    TCP at the wire level

    TCP byte-by-byte: three-way handshake, state machine, sequence numbers, retransmission, window scaling, FIN vs RST. Read packet captures with confidence.

    21 min read·intermediate

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