1. A computer-implemented method, operable in a network comprising multiple delivery service endpoints running on a plurality of devices, each of said delivery service endpoints constructed and adapted to deliver resources, a plurality of said multiple delivery service endpoints comprising a group, wherein each node in said group has at least one kind of responsibility relating to delivery of resources, the method comprising: (A) receiving a request at a node in the group; and (B) based on what kind of responsibility said node has for said request, attempting to process the request outside the group.