HTTP CONNECT and HTTPS Proxy Tunnels: TLS Boundaries and Handshake Latency
An RFC-based explanation of CONNECT tunnels, encrypted HTTPS payloads, and modeled first-request latency.
Network Fundamentals
SOCKS5 Proxy Explained: Protocol Bytes, DNS Resolution Boundaries, and Leakage Risk
Decode safe SOCKS5 CONNECT bytes and compare local-DNS and proxy-side hostname resolution boundaries.
Reverse Proxy Load Balancing: Queues, Health Checks, and a Reproducible Scheduler
Compare round robin and load-aware queue selection while reasoning about health checks and retry boundaries.
Proxy Cache Revalidation: Cache-Control, ETag, and Observable Correctness
Use an RFC 9111 shared-cache model to calculate MISS, HIT, and 304 revalidation latency and correctness boundaries.
Forward Proxy vs Reverse Proxy: Connection Paths, Trust Boundaries, and Latency
A reproducible guide to forward proxies, reverse proxies, tunnels, TLS boundaries, and latency segments.
HTTPS and TLS 1.3 Handshake: Keys, Certificates, and RTT in Practice
Understand TLS 1.3 message flights, certificate authentication, ephemeral key agreement, and handshake latency with a safe teaching model.
HTTP/2, HTTP/3, and CDN Caching: Read Page Speed from a Waterfall
A deterministic browser-waterfall model for HTTP/2, HTTP/3, QUIC streams, and CDN cache hits or misses.
DNS Resolution Explained: Build a TTL Cache and Packet Parser in Python
A runnable DNS guide covering resolution paths, response headers, TTL cache latency, and deterministic Python/C experiments.
CIDR, Longest Prefix Match, and MTU: Calculate IP Routing Step by Step
Calculate CIDR ranges, longest-prefix route choice, and MTU/MSS payload segmentation with runnable Python and C examples.
TCP Reliability and Congestion Window: A Runnable Sequence Number Experiment
Track TCP sequence numbers, cumulative ACKs, loss, retransmission, and congestion-window changes with safe local experiments.