12 Facts About Web server

Web server is computer software and underlying hardware that accepts requests via HTTP or its secure variant HTTPS.

Hardware used to run a web server can vary according to the volume of requests that it needs to handle.

Resource sent from a web server can be a preexisting file available to the web server, or it can be generated at the time of the request (dynamic content) by another program that communicates with the server software.

Web server program plays the role of a server in a client–server model by implementing one or more versions of HTTP protocol, often including the HTTPS secure variant and other features and extensions that are considered useful for its planned usage.

Web server programs are able to translate an URL path, that refers to a physical file system path, to an absolute path under the target website's root directory.

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Web server then reads the file, if it exists, and sends a response to the client's web browser.

In practice, the web server has to handle the request by using one of these response paths:.

Usually, for security reasons, most web server programs are pre-configured to serve only regular files or to avoid to use special file types like device files, along with symbolic links or hard links to them.

Web server programs are able to send response messages as replies to client request messages.

Web server program is able to reply to a valid client request message with a successful message, optionally containing requested web resource data.

Performances of a web server are typically benchmarked by using one or more of the availableautomated load testing tools.

Web server usually has pre-defined load limits for each combination of operating conditions, because it is limited by OS resources and because it can handle only a limited number of concurrent client connections (usually between 2 and several tens of thousands for each active web server process, see the C10k problem and the C10M problem).