A Model for Content Internetworking (CDI)
RFC 3466
Document | Type |
RFC - Informational
(March 2003; No errata)
Obsoleted by RFC 7336
Was draft-ietf-cdi-model (cdi WG)
|
|
---|---|---|---|
Authors | Storigen Systems , Mark Day , Gary Tomlinson , Phillip Rzewski | ||
Last updated | 2015-10-14 | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 3466 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ted Hardie | ||
IESG note | Published as 3466 | ||
Send notices to | (None) |
Network Working Group M. Day Request for Comments: 3466 Cisco Category: Informational B. Cain Storigen G. Tomlinson Tomlinson Group P. Rzewski Media Publisher, Inc. February 2003 A Model for Content Internetworking (CDI) Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2003). All Rights Reserved. Abstract Content (distribution) internetworking (CDI) is the technology for interconnecting content networks, sometimes previously called "content peering" or "CDN peering". A common vocabulary helps the process of discussing such interconnection and interoperation. This document introduces content networks and content internetworking, and defines elements for such a common vocabulary. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Content Networks . . . . . . . . . . . . . . . . . . . . . . 2 2.1 Problem Description . . . . . . . . . . . . . . . . . 3 2.2 Caching Proxies. . . . . . . . . . . . . . . . . . . . 4 2.3 Server Farms . . . . . . . . . . . . . . . . . . . . . 5 2.4 Content Distribution Networks. . . . . . . . . . . . . 6 2.4.1 Historic Evolution of CDNs . . . . . . . . . . . 8 2.4.2 Describing CDN Value: Scale and Reach. . . . . . 8 3. Content Network Model Terms . . . . . . . . . . . . . . . . 9 4. Content Internetworking . . . . . . . . . . . . . . . . . . 12 5. Content Internetworking Model Terms . . . . . . . . . . . . 12 6. Security Considerations . . . . . . . . . . . . . . . . . . 15 7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 15 8. Normative References . . . . . . . . . . . . . . . . . . . . 16 Day, et al. Informational [Page 1] RFC 3466 A Model for Content Internetworking (CDI) February 2003 9. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . 16 10. Full Copyright Statement . . . . . . . . . . . . . . . . . . 17 1. Introduction Content networks are of increasing importance to the overall architecture of the Web. This document presents a vocabulary for use in developing technology for interconnecting content networks, or "content internetworking". The accepted name for the technology of interconnecting content networks is "content internetworking". For historical reasons, we abbreviate this term using the acronym CDI (from "content distribution internetworking"). Earlier names relied on analogy with peering and interconnection of IP networks; thus we had "content peering" and "CDN peering". All of these other names are now deprecated, and we have worked to establish consistent usage of "content internetworking" and "CDI" throughout the documents of the IETF CDI group. The terminology in this document builds from the previous taxonomy of web caching and replication in RFC 3040 [3]. In particular, we have attempted to avoid the use of the common terms "proxies" or "caches" in favor of more specific terms defined by that document, such as "caching proxy". Section 2 provides background on content networks. Section 3 introduces the terms used for elements of a content network and explains how those terms are used. Section 4 provides additional background on interconnecting content networks, following which Section 5 introduces additional terms and explains how those internetworking terms are used. 2. Content Networks The past several years have seen the evolution of technologies centered around "content". Protocols, appliances, and entire markets have been created exclusively for the location, download, and usage tracking of content. Some sample technologies in this area have included web caching proxies, content management tools, intelligent "web switches", and advanced log analysis tools. Day, et al. Informational [Page 2] RFC 3466 A Model for Content Internetworking (CDI) February 2003 When used together, these tools form new types of networks, dubbed "content networks". Whereas network infrastructures have traditionally processed information at layers 1 through 3 of the OSI stack, content networks include network infrastructure that exists inShow full document text