{"id":25773,"date":"2025-06-18T21:03:34","date_gmt":"2025-06-18T19:03:34","guid":{"rendered":"https:\/\/tremhost.com\/blog\/?p=25773"},"modified":"2025-06-18T21:03:34","modified_gmt":"2025-06-18T19:03:34","slug":"what-is-a-web-server-and-what-does-it-do","status":"publish","type":"post","link":"https:\/\/tremhost.com\/blog\/what-is-a-web-server-and-what-does-it-do\/","title":{"rendered":"What is a web server and what does it do?\u00a0"},"content":{"rendered":"
<\/div>

A <\/span>web server<\/span><\/strong> is essentially a computer program and its underlying hardware that stores website files and delivers them to users’ web browsers over the internet.<\/span><\/p>\n

<\/div>\n

Think of it like this:<\/p>\n

    \n
  • You (the user) are a customer<\/strong> in a vast library.<\/li>\n
  • Your web browser (like Chrome, Firefox, Safari)<\/strong> is your librarian.<\/li>\n
  • The web server is the actual library building itself, along with the librarian (the software) who manages the books.<\/strong><\/li>\n
  • The website files (HTML, CSS, images, videos, etc.)<\/strong> are the books and other resources in the library.<\/li>\n<\/ul>\n

    What a Web Server Is (Hardware & Software):<\/strong><\/p>\n

      \n
    • Hardware:<\/strong> This refers to the physical computer where all the website’s files (HTML documents, images, CSS stylesheets, JavaScript files, videos, etc.) are stored.<\/span> This computer is always connected to the internet.<\/span>\n
      <\/div>\n
      <\/div>\n<\/li>\n
    • Software:<\/strong> This is the program that understands how web users access the stored files.<\/span> At its core, it includes an <\/span>HTTP server<\/span><\/strong>.<\/span> The HTTP (Hypertext Transfer Protocol) server is the software that understands URLs (web addresses) and HTTP (the language your browser uses to communicate with the server).\n
      <\/div>\n
      <\/div>\n<\/li>\n<\/ul>\n

      What a Web Server Does (Its Functions):<\/strong><\/p>\n

        \n
      1. Stores Website Files:<\/span><\/strong> The primary function is to store all the data that makes up a website.<\/span>\n
        <\/div>\n<\/li>\n
      2. Listens for Requests:<\/span><\/strong> It constantly “listens” for incoming requests from web browsers.<\/span> When you type a URL into your browser or click a link, your browser sends an <\/span>HTTP request<\/span><\/strong> to the relevant web server.<\/span>\n
        <\/div>\n
        <\/div>\n<\/li>\n
      3. Processes Requests:<\/strong>\n
          \n
        • The web server’s software receives and processes this request.<\/span>\n
          <\/div>\n<\/li>\n
        • It interprets the URL to identify which file or resource the user is asking for.<\/span>\n
          <\/div>\n<\/li>\n
        • It performs security checks (e.g., authentication, access permissions).<\/li>\n<\/ul>\n<\/li>\n
        • Retrieves Content:<\/strong> It then locates the requested file(s) within its storage.<\/span>\n
          <\/div>\n<\/li>\n
        • Delivers Content (HTTP Response):<\/span><\/strong> Once found, the web server sends the requested content back to your web browser via <\/span>HTTP<\/span><\/strong>.<\/span> This content could be:\n
          <\/div>\n
            \n
          • Static Content:<\/strong> Files that are delivered exactly as they are stored (e.g., a simple HTML page, an image, a PDF document).<\/li>\n
          • Dynamic Content:<\/span><\/strong> Content that is generated or updated in real-time based on user input, data from a database, or other factors (e.g., results of a search query, a personalized user profile, an e-commerce shopping cart).<\/span> For dynamic content, the web server often works with an “application server” and a “database.”<\/span>\n
            <\/div>\n
            <\/div>\n<\/li>\n<\/ul>\n<\/li>\n
          • Handles Errors:<\/span><\/strong> If the requested file isn’t found or there’s another issue, the web server sends an appropriate error message (like the common “404 Not Found” error).<\/span>\n
            <\/div>\n<\/li>\n
          • Manages Traffic:<\/span><\/strong> Web servers are designed to handle many requests simultaneously from multiple users, ensuring efficient delivery of content.<\/span> They can use techniques like load balancing to distribute incoming traffic across multiple servers.<\/span>\n
            <\/div>\n
            <\/div>\n<\/li>\n
          • Security:<\/strong> They implement various security measures like firewalls, SSL\/TLS encryption (for secure communication via HTTPS), and access controls to protect data and prevent unauthorized access.<\/span>\n
            <\/div>\n<\/li>\n
          • Logging and Monitoring:<\/span><\/strong> Web servers keep detailed logs of user interactions and server performance, which are useful for troubleshooting, analyzing traffic trends, and improving website functionality.<\/span>\n
            <\/div>\n<\/li>\n<\/ol>\n

            In essence, a web server acts as the crucial intermediary between a user’s browser and the vast amount of information stored on the internet, making websites and web applications accessible to everyone<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

            A web server is essentially a computer program and its underlying hardware that stores website files and delivers them to users’ web browsers over the internet. Think of it like this: You (the user) are a customer in a vast library. Your web browser (like Chrome, Firefox, Safari) is your librarian. The web server is […]<\/p>\n","protected":false},"author":226,"featured_media":13775,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[163],"tags":[],"class_list":{"0":"post-25773","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-hosting"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/posts\/25773","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/users\/226"}],"replies":[{"embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/comments?post=25773"}],"version-history":[{"count":1,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/posts\/25773\/revisions"}],"predecessor-version":[{"id":25774,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/posts\/25773\/revisions\/25774"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/media\/13775"}],"wp:attachment":[{"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/media?parent=25773"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/categories?post=25773"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/tags?post=25773"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}