Content Delivery Networks (CDNs) have been identified as one of the relevant use cases where the emerging paradigm of Network Functions Virtualization (NFV) will likely be beneficial. In fact, virtualization fosters flexibility, since on-demand resource allocation of virtual CDN nodes can accommodate sudden traffic demand changes. However, there are cases where physical appliances should still ...

Content Delivery Networks (CDNs) have evolved to overcome the inherent limitations of the Internet. CDNs approach is based on the observation that serving web content from a single location can present serious problems for site scalability, reliability and performance. Hence, a system is devised to serve requests of end-user from nearby optimal surrogate server. CDN replicates content from the ...

In order to fully utilize the stable edge transmission capability of CDN and the scalable last-mile transmission capability of P2P, while at the same time avoiding ISP-unfriendly policies and unlimited usage of P2P delivery, some researches have begun focusing on CDN-P2P-hybrid architecture and ISP-friendly P2P content delivery technology in recent years. In this paper, we first survey CDN-P2P-...

Content Delivery Networks (CDN) aim at overcoming the inherent limitations of the Internet. The main concept at the basis of this technology is the delivery at edge points of the network, in proximity to the request areas, to improve the user’s perceived performance while limiting the costs. This paper focuses on the main research areas in the field of CDN, pointing out the motivations, and ana...

The recent introduction of Content Distribution Networks (CDNs) enhances the delivery of high quality multimedia content to end users. In a CDN architecture, the content is replicated to so-called surrogate servers, generally at the edge of the transport network, to improve the quality of service (QoS) of streaming multimedia delivery services. By using peer-to-peer (P2P) technologies, these ed...

Edge-Side Includes (ESI) is an open mark-up language that allows content providers to break their pages into fragments with individual caching characteristics. A page is reassembled from ESI fragments by a content delivery network (CDN) at an edge server, which selectively downloads from the origin content server only those fragments that are necessary (as opposed to the entire page). This is e...

Content distribution networks (CDN) have been increasingly used as the scalable solution to deliver high-quality multimedia content. However, despite the promising concept, current self-organizing content distribution networks (using realtime replica placement) lack placement and retrieval algorithms that are both intelligent and scalable. In this paper we present an architecture and relating a...

In the current Internet, more and more providers are developing and deploying their own Content Delivery Networks in order to improve the Quality of Experience and decrease the load within their networks. An interesting scenario would be to interconnect these networks to cooperate between these different Content Delivery Networks. The IETF Content Delivery Network Interconnection Working Group ...

We describe a new architecture for an open Content Delivery Network (CDN) built from a single software component, Request-Redirector, collocated with the web server. The Request-Redirector encapsulates all the functions that a CDN requires. In particular, a mechanism to redirect client requests to edgeservers; a local network proximity database used to select the best edge-server; and a mechani...