Most Web browsers ask the server to keep the connection open across multiple requests. This is referred to as HTTP Keep-Alives. Keep-Alives is an HTTP specification that allows for greatly enhanced server performance. Without it, a browser would have to make numerous connection requests for a page containing multiple elements, such as graphics. A separate connection may have to be made for each element. These additional requests and connections require additional server activity and resources, decreasing server efficiency. They also make a browser much slower and less responsive. HTTP Keep-Alives are enabled by default during the installation process.
To disable HTTP Keep-Alives