Computer Networks

A book-shaped table of contents for computer networking, from first principles to production systems: Ethernet through IP, TCP/UDP/QUIC, DNS, the HTTP ecosystem, security, cloud/Kubernetes networking, performance engineering, observability/debugging, and distributed-systems networking — cross-linking existing kubernetes/sre/system-design/tech notes instead of duplicating them.

1 — UDP

UDP's datagram model and reliability trade-offs, and why DNS, VoIP, and gaming traffic choose it over TCP.

2 — TCP Fundamentals

The TCP three-way handshake and four-way termination, the TCP header, sequence numbers, and ACKs that make reliable delivery possible.

3 — Reliable Transmission

How TCP achieves reliability in practice — sliding window, flow control, congestion control, slow start, AIMD, and fast recovery.

4 — TCP Optimization

Production TCP tuning: the Nagle algorithm, delayed ACK, keep-alive, window scaling, and TCP Fast Open.