For an average web page, this process takes place once for each object within the page: a graphic, an embedded video or Flash file, and even a CSS template. In step 2, notice that the browser looked up the IP address of server.com. Every machine
attached to the Internet has an IP address—your computer included. But we generally access web servers by name, such as google.com. As you probably know, the browser.
consults an additional Internet service called the Domain Name Service (DNS) to find the server’s associated IP address and then uses that to communicate with the computer.