Urlosning

Urlosning is a term used in information technology to describe the sequence by which a URL is translated into the resource ultimately delivered by a server. The term combines URL with the notion of a solution or resolution and is used in some Nordic IT contexts to denote the resolution process.

The process typically begins with DNS resolution to map the hostname to one or more IP addresses, followed by establishing a transport connection, usually via TLS for HTTPS. The client then issues an HTTP request, and the server may respond with redirects (3xx), causing the client to perform additional requests. Along the way, content delivery networks and caching layers may serve cached copies, reducing latency. The final response content is returned to the client after following redirects and handling any content negotiation (language, encoding).

Urlosning also encompasses error handling when DNS fails, the host is unreachable, TLS handshake fails, or the server returns error status codes (4xx/5xx). The concept is relevant for understanding web behavior and for debugging, performance optimization, and network administration.

In practice, effective urlosning involves managing DNS caching, optimizing redirects, and leveraging caching and CDNs to minimize latency. It is closely related to broader topics in web architecture, such as URL routing, DNS resolution, TLS configuration, and HTTP semantics.