In CCN, due to its added and built-in data structure of the Content Store (CS), Pending Interest Table (PIT), the Interests from Subscribers are binded using diffrent techniques such as DHT, and other forms of NR. These interests are then forwarded based on the algorithm of the Forwarding Information Base (FIB). When interest cross nodes, the PIT checks on its table if the interest has ever been served (this means a copy if cached some where), if the result if TRUE, then the data packet is fetched from a CS and served. Otherwise, a score record of not success is saved in the PIT and FIB forwards the interest into the network using AssymHRouting, HRSymm or HR_Multicast until a publisher grants the interest. So caching concepts handles the remaining operation.

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