Internet Information Services (IIS) is a flexible, general-purpose web server from Microsoft and runs on Windows systems. Hence, to serve requested HTML pages or files. An IIS web server accepts requests from remote client computers and returns the appropriate response.
Explaining Internet Information Service
An IIS web server accepts requests from remote client computers and returns the appropriate response. This basic functionality allows web servers to share and deliver information across local area networks, such as corporate intranets, and wide area networks, such as the internet.
A web server can deliver information to users in several forms, such as static webpages coded in HTML, through file exchanges as downloads and uploads; and text documents, image files and more.
How IIS Works
IIS works through a variety of standard languages and protocols. HTML is used to create elements such as text, buttons, image placements, direct interactions/behaviors and hyperlinks. The Hypertext Transfer Protocol (HTTP) is the basic communication protocol used to exchange information between web servers and users. HTTPS — HTTP over Secure Sockets Layer (SSL) — uses Transport Layer Security or SSL to encrypt the communication for added data security. The File Transfer Protocol, or its secure variant, FTPS, can transfer files.
Internet Information Services Features
IIS is rich with features. . It can be used as an FTP server. Likewise as host WCF services. And be extended to host web applications built on other platforms such as PHP.
There are built-in authentication options such as Basic, ASP.NET, and Windows auth. The latter is useful if you have a Windows Active Directory environment. Other built-in security features include TLS certificate management and at the same time binding for enabling HTTPS and SFTP on your sites, request filtering for whitelisting or blacklisting traffic, authorization rules, request logging, and also a rich set of FTP-specific security options.
One key feature of IIS is the application pool. We will have to take a closer look at the application pool, as it is a critical component of the IIS process model.
An invaluable feature is remote management. You can script everything, which is great if you like the power that comes with being able to do so.
How IIS Handles Web Requests
How does IIS handle web requests? The two main process models for web servers are to either handle all requests on a single thread, or to spawn a new thread for each request. The single-thread model has some worker threads available. It typically only uses them for certain kinds of work, such as file system access. The thread-per-request model that IIS is the lightweight cousin of IIS Express. It uses will grab a thread from a thread pool for each request.
Web servers typically handle requests using a request-response pattern. The client sends a request and receives a response if all goes well. HTTP protocol is the ubiquitous choice when communicating between a client and web server over the internet.
Modern web servers can provide far more functionality for a business and likewise or its users. They tie enterprise middleware and also back-end applications together to create enterprise-class systems.