The basic premise of global server load balancing (GSLB) is to provide the best answer for a particular resource based on information obtained from the requesting LDNS’s IP address. There are many options and modes for deploying GSLB, including round trip time calculations, IP geolocation, dynamic server load, ratios, and resource monitoring. Since each LDNS server can receive a different answer for a given A-record request it is possible for the same LDNS server to receive different answers at different times. In general, GSLB services are incompatible with traditional DNSSEC implementations. DNSSEC specs were not designed with consideration of GSLB.