The Google search box sends requests through the Hypertext Transfer Protocol (HTTP) or Hypertext Transfer Protocol Secure (HTTPS) to the Google server.
When a user types a query into the search box and clicks on the "Search" button or hits enter, an HTTP or HTTPS request is generated by the browser. The request contains the user's query, as well as additional parameters and headers.
The query is typically sent to the server as a Uniform Resource Locator (URL) with the query parameters encoded within. For example, if the user's query is "How does the Google search box work?", the URL might look like this:
The query parameters (in this example, "q") hold the user's query, and they are URL-encoded to ensure proper transmission. This encoding replaces special characters with corresponding percent-encoded values.
Once the request is sent, the Google server processes the query and returns a response to the user's browser, which then displays the search results. The response is typically in Hypertext Markup Language (HTML) format, containing the search results, along with additional resources like images, snippets, advertisements, and other elements that make up the search engine results page.