DynConD also has traditional GSLB functionality, by introducing support for a server-side composite DNS metric calculation. If DynConD is used as a traditional server-side GSLB, DynConD calculates the server-side composite DNS metric for A/AAAA RRs and returns A/AAAA RRs to the standard DNS client/resolver based on server availability, service response time and server load sorted from optimal to the less suitable. In this case DynConD library isn’t necessary on the client side so standard resolvers can be used. By using DynConD in this way, real-time network distance between client and server is not measured and no client-side server availability check is made by the DNS resolver.