The original intention of NDN is to propose a new network naming and routing model. NDN uses naming-based data caching in routers. Each NDN packet has a content name, which will

Encrypted signature. The distribution of data is caused by requests. Routers send named prefix advertisements through routing protocols such as IS-IS and BGP. The requester will send an interest package containing the tag of the requested data.

Knowledge. After the router receives the request packet, it will record the interface where the request packet enters the router, and then forward it through the name-based routing and forwarding protocol. Once the interested packet finds that there is corresponding data on the node, the data packet

Will return, the packet contains the name of the requested data and the corresponding data. Finally, it is returned to the requester through the reverse path data packet.

The key point of NDN is that the router can cache the specified data. When the request arrives at the router, the locally stored data can be returned to the requester. Supporters of NDN believe that the original attribute of network design is counting.

Based on distribution rather than communication between nodes. The deployment of NDN requires a large number of routers in the Internet to have storage space. Naming data can be stored in NDN router and can respond to corresponding requests.

① Users of the data access interface can request data, so that the data can be cached in NDN, so that subsequent identical data requests can be corresponding through the routing cache of NDN. ②

Data management users have no ability to delete data stored in NDN routers. However, in the future, you can limit the storage time of the cache on the router by setting the lifetime. ③

The data query function does not provide ④ access control authority. All modes are supported. The sender will encrypt the data it sends. ⑤ The resource control interface does not provide ⑤ discovery mechanism. In NDN, names are used to address and discover. The geographical names of NDN are hierarchical, can be definitely constructed, and are in the state of research. ⑦ The storage mode is object-based.