1. A computer-implemented method comprising: obtaining a DNS query from a client computing device at a first DNS server, wherein the DNS query corresponds to a requested resource associated with a first resource identifier, wherein the first resource identifier corresponds to a uniform resource locator; determining that the first resource identifier is associated with a second DNS server; responsive to the determination that the first resource identifier is associated with a second DNS server, identifying, by the first DNS server, one or more alternative DNS servers that are operative to resolve the DNS query to identify a cache component for providing the requested resource; based at least in part on the DNS query, for each of the one or more alternative DNS servers, determining, by the first DNS server, performance measurement information for delivery of data from the respective alternative DNS server and a threshold performance numerical value; selecting, by the first DNS server, the second DNS server from the one or more alternative DNS servers to further process the DNS query, the selecting based at least in part on a comparison of the performance measurement information and the threshold performance numerical value; transmitting the DNS query to the second DNS server; resolving the DNS query, at the second DNS server, to identify a cache component for providing the requested resource; and transmitting information identifying the identified cache component to the client computing device.