RADIUS request routing tables; however, this workaround does not scale as the number of exception entries grows. Several solutions have been proposed to eliminate this workaround in future, the most promising of which is "RADIUS over TLS with Dynamic Discovery", which does not rely on static routing tables inside a RADIUS server configuration to route requests to their proper destination. Instead, the participating institution adds one single DNS resource record to its own domain's DNS zone which states by which server eduroam authentication for the domain is handled.