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Information-centric networking: Concepts for a future Internet

Information-centric networking: Concepts for a future Internet. David D. Clark, Karen Sollins MIT CFP November, 2012. Background . Both the NSF and the EC have funded a number of projects to look at architectures for a future Internet.

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Information-centric networking: Concepts for a future Internet

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  1. Information-centric networking:Concepts for a future Internet David D. Clark, Karen Sollins MIT CFP November, 2012

  2. Background • Both the NSF and the EC have funded a number of projects to look at architectures for a future Internet. • What might the Internet of 15 years from now look like? • Various of the proposals are motivated by different visions of the future: • Mobility, cloud, etc. • Information-centric networks (ICN) is one such theme.

  3. The general idea • Today, the Internet hooks computers together. • But computers are just a low-level platform for higher level services and objects. • Why not design the network to connect to services and objects, rather than machines? • Better align mechanism with application-level goals.

  4. Mechanically… • In ICN designs, the network knows about these higher-level objects. • There are names for these objects that are visible at the network layer. • These names can drive packet forwarding and other network-level services.

  5. The benefit? • In general, the objective is more efficient delivery of content, in particular high-volume popular content. • Today, the network layer computes routes among machines. • CDNs pick the source cache from which to deliver content. • These two mechanisms are not well coupled. • Can ICNs solve this problem? • When lots of people want the same content, can the network help with efficient delivery? • (Specific proposals have other objectives.)

  6. Very different approaches • Explicit vs. implicit positioning of content. • Security model. • Privacy model. • Relation to CDNs and higher-level services.

  7. Named data networking • NDN: • Data is broken into packets, each of which have a name. • To fetch data, send an interest packet, with the name of the desired data packet. • Every router in the network can cache data packets. • A strategy layer tries to forward the interest in a useful direction toward the data.

  8. Publish/subscribe for Internet • PSIRP: • Producer of content picks a set of machines to host the content. (A scope.) • Scopes are recursively named, and have explicit addresses. • A subscribe (similar function to an interest) is explicitly forwarded to the scope, which picks a source machine for the transfer.

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