Impact of Social networking sites on Local DNS server

The numbers of online social networking sites are growing rapidly. The social networking sites have redefined the way we interact online. Most of the social networking sties provide customizable personal pages to its members. During customization user may embed contents from different web sites that provide contents in a form of HTML embed codes. Thus a page may contain different contents from several different web sites. As a result a page download may generate hundreds of DNS queries and even if few people visit these social networking sites at the same time and if they are using same Internet service provider, the number of DNS queries sent to local DNS server is quite huge. In many cases the local DNS server are unable to handle such DNS traffic thereby it slows down all its services. Such overloaded DNS server is susceptible to Denial of Service attacks as well. In this paper I tried to mention some of available methods that social networking sites could implement to reduce such DNS references and also tried to mention some methods to improve the carrier network so that it can handle such huge DNS traffics.