Area 04 · 8 topics

Networking

From packets to protocols: the layers your HTTP call travels through, where latency hides, and how to debug it.

Layers, encapsulation, and what each one guarantees.

Handshakes, congestion control, head-of-line blocking.

Resolvers, TTLs, and why “it’s always DNS”.

Keep-alive, multiplexing, QUIC — why each version exists.

The handshake, certificates, and forward secrecy.

Real-time options and their failure modes.

Contracts, streaming, deadlines across services.

L4 vs L7, algorithms, health checks.