Networking

SDN separates network control from forwarding hardware. Learn the architecture, key protocols like OpenFlow and P4, top open-source controllers, and how Google and AWS use it.

Iroh 1.0 ships a stable P2P networking library that connects devices by cryptographic key instead of IP address. QUIC under the hood, 90% hole-punch success, 200M+ endpoints/month, and now stable language bindings for Python, Node.js, Swift, and Kotlin.

Discover how IPv6's massive address space eliminates the need for NAT, restoring true end-to-end connectivity. Learn the technical differences between IPv4 and IPv6, why NAT was necessary, and how IPv6 enables direct peer-to-peer communication for gaming, VoIP, IoT, and more.

A complete guide to HTTP Content-Length header and chunked transfer encoding. Learn how servers communicate response size, when to use each approach, and practical implementation examples for developers.

Learn how X-Forwarded-For and Forwarded HTTP headers help preserve client IP addresses through proxies and load balancers. Understand their use cases for logging, security, rate limiting, and geolocation.

Learn how NAT traversal enables peer-to-peer connectivity through firewalls and routers. Understand STUN, TURN, ICE protocols, hole punching techniques, and practical implementation strategies.

Discover the best self-hosted VPN solutions in 2026. Compare WireGuard, AmneziaVPN, Headscale, NetBird, and WG-Easy for privacy, security, and performance.

Master SSH port forwarding with practical examples for local, remote, and dynamic tunneling. Learn how to securely access databases, bypass firewalls, and debug applications.

Understand `127.0.0.1`, loopback addresses, and how they work in networking. Learn why localhost points to `127.0.0.1` and how to use loopback for development and testing.

Discover why ping doesn't use TCP or UDP ports. Learn about ICMP protocol, network layers, and the difference between ping and port-based connectivity testing.