InternetExplorerDriver

In order to execute your test scripts on the Internet Explorer browser, you need WebDriver's InternetExplorerDriver. Similar to Google Chrome and Firefox, we need to download the IEDriver Server executable from https://www.seleniumhq.org/download/  for Internet Explorer.

The IEDriver server then uses its IEThreadExplorer class, which is written in C++, to drive the IE browser using the Component Object Model framework.