The bandwidth will be wasted if the DNS continually sends requests to the unavailable machine, when the server is failed so. This problem occurs only during start up, for a client application. The unavailable servers are removed by searching the DNS entries by a WebLogic server. This prevents the accessibility of a client to a failed server.To avoid the DNS requests those are unnecessary, with the browser-based clients, a third-party load-balancers are used. These are Resonate, BigIP, Alteon, and Local Director. The masking of multiple DNS addresses into a single address is done by these third-party load-balancers.