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...ns and protocols for debugging and verification. Like with standard logging subsystems, developers can integrate X-Trace into their applications. It is actually being used by the team developing DONA =-=[16]-=-, a content-based routing scheme for the Internet. 6 Discussion While X-Trace has many uses, it also has limitations. We discuss those here, as well as other interesting aspects. Evaluation The exampl...

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...ogging [8], en∗ Work done while this author was an intern at Intel Labs Berkeley. cryption [1], filtering and intrusion detection [14], as well as a variety of more forward-looking research proposals =-=[21, 36, 39]-=-. In current networking equipment, however, high performance and programmability are often competing goals—if not mutually exclusive. On the one hand, high-end routers, because they rely on specialize...

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... system, which has the responsibility of handling the matching between the publishers and subscribers. The rendezvous does not need to differ substantially from other topic-based pub/sub systems; cf. =-=[15, 23, 36]-=-. Whenever it identifies a publication that has both a publisher (or an up-to-date cache) and one or more active subscribers, it requests the topology system to construct a logical forwarding tree fro...

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...ontent in the networking communication model. The fundamental principles of CCN have been investigated by a number of researchers over the last decade. Populard esigns are TRIAD [15], ROFL [11], DONA =-=[17]-=-, and more recently NDN [3, 16]. Key CCN features are: (1) content items have an identifier and not content hosts, (2) routing leverages content identifiers and not host identifiers for forwarding ope...

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...-4/12/08 ...$15.00. 1. INTRODUCTION Naming content objects directly, instead of their respective end-hosts, gives the opportunity to identify content objects as they travel from source to destination =-=[16, 13, 12]-=-. In turn, given that the network transfers named objects (instead of unidentifiable data containers, i.e., IP packets), these objects can be cached in the network and be forwarded to subsequent users...

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...can refer to another not only by its name, but also by the cryptographic digest of its contents (forming effectively a self-certifying name [23, 25, 11, 8]), or by the identity (key) of its publisher =-=[8, 29, 22, 21]-=-). This allows individual signed pieces of content to effectively certify other pieces of content they (securely) refer to; each piece of content the user encounters acts as a potential piece of evide...

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...idered a cache hit and the data-packet is forwarded to the requester. PSIRP [17], as another content-centric proposal, uses a different approach to data naming. It follows an approach similar to DONA =-=[13]-=-’s flat labels, using a combination of cryptographic measures; it uses a cryptographic fingerprint computed over the piece of content or some other similar, algorithmically generated identifier. The c...

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...of content to trust in the host that stores it, and then additionally requires secure mechanisms to identify, locate and communicate with that host. This is widely recognized as a significant problem =-=[11, 21]-=-. Because the “trust” the user gets in the content they depend upon is tied inextricably to the connection over which it was retrieved, that trust is transient – leaving no reliable traces on the cont...

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...everal caches linked together, allowing each cache to also forward requests to its neighbors when needed. Common examples of such systems are hierarchical web and file system caches. Recently [1] [2] =-=[3]-=-, there have been proposals for multi-cache designs over networks of Internet-like scale and structure. Determining the performance of a specific multi-cache system is extremely difficult. Even for th...