1. A computer-implemented system comprising: a data store for storing performance monitoring information associated with network components associated with client computing device requests for content; and a computing system in communication with said data store and associated with a service provider, the computing system including a hardware component and operative to: obtain a first domain name service (DNS) query responsive to at least one resource identifier, the first DNS query corresponding to a resource associated with the resource identifier, and the first DNS query being provided in accordance with a first network scheme; determine an alternative identifier responsive to the first DNS query, the alternative identifier to cause a second DNS query associated with the resource to be transmitted to a component associated with the service provider utilizing a second network scheme; and determine an ordered priority of network schemes to use to access particular components associated with the service provider, the determination of the ordered priority being based on performance information associated with the first and second DNS queries.