1. A computer-implemented method, comprising: forwarding, by a network node via an egress interface, an Interest specifying a location-independent, hierarchical, variable-length content name that identifies a first Content Object; storing, in a Pending Interest Table (PIT) within a data repository of the network node, a PIT entry for the Interest specifying the egress interface and a return interface; receiving, by the network node, a second Content Object associated with the same content name via a second interface; performing, based on the content name, a lookup operation in the PIT to identify the PIT entry for the previously forwarded Interest; determining, from the PIT entry, the egress interface used previously by the network node to forward the Interest; and responsive to determining that the egress interface specified by the PIT entry matches the second interface for the Content Object, forwarding the Content Object via the return interface specified in the PIT entry.