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How do clients handle DNS requests to failed servers?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.
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