Named Data Networking

Transcription

1 Named Data Networking Ronald van der Pol

2 Outline! Goal of this project! Shortcomings of current internet! NDN basics! NDN forwarding! Naming example! Security! Personal opinion

3 Goal of this project! Technology assessment of Named Data Networking! What is it?! How does it work?! What are the pros and cons?! Is it useful in NREN networking?! Demo at the end of the year to show potential use! Named Data Networking is a new way of data transport! Idea of Van Jacobson (PARC)! Supported by Lixia Zhang (UCLA & IRTF RRG co-chair)

4 Current Internet Communication between computers. Computers are have a name (identity) and address (location). Content is stored on these computers. Connect to a computer and retrieve data.

5 Internet Shortcomings! TCP/IP did a great job, but the problem has changed! More and more content delivery (YouTube, itunes, Facebook, BitTorrent, etc)! Irrelevant on which computer the content is stored! In current internet we connect to a specific server/website! Mobility (mobile devices, smartphones, tablets, etc)! Devices are constantly changing location in topology! location change è address change è identity change! Multicast (point to multipoint traffic, e.g streaming video)! Current internet has problems when everybody looks at the same content at the same time (breaking news, popular YouTube movie, live sport events)! Security! Data containers (communication links, servers) are secured, not the data itself

6 NDN Concepts! Each piece of data has a name / Packets say what, not who (no src or dst)! Two packet types: Interest & Data! Receiver sends an Interest, reply comes as Data packet Content Store interest packet name? name data Data packet

7 NDN Forwarder name Content Store data / FIB prefix face 0 Pending Interest Table name face / 0 1 / / 1 1, 2 2

8 Pending Interest Tables / PIT prefix PIT prefix PIT prefix /

9 2 nd Interest Packet / / /v / /v3 0 3 PIT prefix 0 / /v3 0 1 PIT prefix 1 0 / / /v3

10 Naming Example / latest version: / specific version: / sport nieuws all news of specific day: / all news of today: / foo foobar bar Semantics defined by applications, transparant for network v1 v2 v3

11 Security! Data itself is authenticated! Currently we secure links and servers (SSL, ACLs, etc.)! All NDN data packets are signed! Signature over name, data & metadata! Public key signatures! Binding between name and data (no name lookups needed)! It does not matter where you get your copy from! NDN data packets may be encrypted! For the network layer, the security information is just bits

12 Open Questions! Routing based on names! Packet formats! Efficiency! Content store parameters!.! Size?! When to purge data?! What data is purged first?

13 Personal Opinion! Many interesting aspects that seem to resolve real issues! NDN will not replace TCP/IP, but co-exist! Choose the protocol that solves your problem best Sometimes TCP/IP, sometimes NDN! Computers will have many interfaces (wired, WIFI, G4, etc) on many VPNs like CDN VPNs (Google, Amazon, music stores), social media VPNs (Twitter, Facebook, LinkedIn), Internet VPN, etc.)! NDN may finally solve the multicast problem! Natural and simple way of delivering same content to many receivers

14 Network Slices Interesting new services I just use them through an app! slide by Chip Elliott (GENI Program Office) Good old Internet Slice 0 Slice 1 Slice 1 Slice 2 Slice 3 Slice 4

15 Thank you Ronald van der Pol