A cache validating SCIT-DNS Server including a server cluster, a cache copy, a controller and a validation module. Each of the servers in the server cluster uses a DNS mapping cache which maps DNS name(s) to record entry(ies). The cache copy maintains an image of DNS mapping cache(s). The controller manages the state of servers. States include a live spare state; an exposed state; a quiescent state; and a self-cleansing state. The validation module validates DNS entry(s) using a retriever module and a comparisons module. Retriever module retrieves an independent record entry associated with a selected DNS name from an external DNS resolver. The comparison module compares the independent record entry retrieved by the retriever module with the record entry associated with the selected DNS name residing in the cache copy. The validation module may cause server(s) to take an affirmative action in response to detected validation error(s).