Networking

Many teams still introduce NGINX as “just a web server.” In production it usually sits in front of your app: clients hit NGINX first; your Node, .NET, or Java p…

When GET https://app.example.com/api/orders/42 returns 502, the failure may sit at DNS, the external load balancer, an Ingress controller, a Service selector, a…

A load balancer spreads connections so one machine does not take all the pain. Layer 4 routes on IP and port — fast and protocol-agnostic. Layer 7 reads HTTP ho…

A payment retry button, wired to a 0-RTT-resumed TLS connection for speed, gets pressed twice by an impatient user — and somewhere on the network, a captured co…

Traditional corporate network security relies on perimeter defense models: once an employee connects to an office VPN or passes through a bastion host, they gai…

A WebSocket delivers every message reliably and in order over TCP — which sounds like exactly what a multiplayer game needs, until you realize that guarantee is…