Changes performed on the TCPWave DDI controller are reflected immediately on the remote TCPWave DDI appliances. The users have the privilege to schedule it for a future time. TCPWave DNS is resilient to network outages. It can automatically query the upstream authoritative sources and respond without service interruption. TCPWave is the only provider to offer a technology for converting a recursive cache-only DNS resolver into a standalone emergency master when a wide area network blackout is experienced. TCPWave is also the only provider to provide a CNAME flattening technology to its customers. Finally, TCPWave is the only provider to strip out DNS poisons and taints from the responses received from the third-party delegations that can potentially poison the internal recursive caches of an organization.