Why Do We Need Content-Centric Networking - Essay Example

Introduction The internet usage within the last decade has moved away from browsing to content dissemination. Presently, Internet users want to know that content that is available and how to get the content speedily, on demand, anywhere, on the go, on any device. The ICN paradigm comprises of communications that center around the production and consumption aligning with user interest. Content centric networking enables networks to self-organize and thrust relevant content where required. The core concern of the network hinges on exposing, finding, and delivering information, instead of the reachability of end-host, as well as the maintenance of conversations between them. The paradigm can be categorized into two functional parts: information retrieval and information dissemination or exposure. CCN directly routes and delivers pieces of content at the packet level of the network, allowing automatic and application-neutral caching in memory wherever situated in the network (Karl, and Andreas 331). This yields to efficient and effective delivery of content when required. Given that the architecture allows caching effects as an automatic consequence of packet delivery, memory can be utilized without building costly application-level caching services. Why do we need content-centric networking (CCN)? CCN’s security model centers on explicitly securing the content itself rather than endpoints, whereby packets travelling across the network content can be safeguarded against from alteration, damage, or snooping from unauthorized parties. Name data networking or content-centric networking represents an alternative approach to the architecture of computer networks. CCN draws from the principle that a communication network ought to allow a user to focus on the data that one needs instead of having to reference an explicit, physical location where the data is to be retrieved (Wang, Chen, Zhou, and Qin 93). The modern internet architecture centers on a host-based conversation model generated to enable geographically distributed users to utilize a number of significant, immobile computers. The content-centric networking pursues to adapt the network architecture to match the present network usage patterns. Content-centric networking presents a broad range of benefits such as content caching to minimize congestion and enhance delivery speed. CCN also allows simpler configuration of network devices, besides building security into the network at the data level; nevertheless, the change of communication paradigm may present challenges for network activities such as real-time multimedia applications (Karl, and Andreas 332). Recent research has demonstrated that such applications may be feasible. Moreover, building content routers that back content-centric networking at high speed remains an open problem to crack. How it works Application-layer designs forms the basis of content-centric interface. This presents benefits such as easier deployment, improved flexible delivery, and effortless backwards compatibility. The present internet establishment features a tree of physical equipment to link streams of packets from any leaf to another. The present system can be regarded as efficient for communication, but not for distribution. The overall proposal of content-specific networking appreciates that a significant amount of information produced once, and then repeated numerous times. Hence, it is sensible to distribute the copying of any correlated activities into the networks’ tree of equipment. In most of the instances, significant storage exist, and could be utilized more efficiently in the event that it could recognize certain content and only remain with one copy of it. The structure of the network equipment (tree shape) scales content delivery to match the size of the audience and minimize up-stream equipment to the minimum required to generate the content. CCN utilizes a practical data storage cache at every level of the network, which in turn, dramatically minimizes the transmission traffic, and also enhances the speed of response. CCN envisions packet-level cache manifests at every node within the tree of network equipment rather than a complete copy of some media file. When a consumer requests some data, the data will be propagated via the network; a second request on the same data takes a short time given that the requested data is still located within the cache at some level. A critical issue with CCN delivery centers on guaranteeing that the name of the content adequately describes the information. The advantages of content-centric networking include empowering the user, simplifying network usage, availing a seamless, ubiquitous experience, minimizing congestion and latency, enhancing network performance while minimizing operation costs, enhancing network reliability, eradicating numerous security problems, and supporting new and emerging applications. Effect of content-centric networking (CCN) on TCP/IP Communications The present challenges of the internet can be regarded as a natural consequence of its architecture, which was structured to address the communication needs of a period when a network was necessitated for sharing rare and expensive resources such as long communication links and peripherals. The core requirement from the Internet at that period was simply that of forwarding packets of data among a few stationary machines with established trust relationships (Karl, and Andreas 331). The synchronizing and accessing of information should not remain a difficult task, as is the case with current networking approaches that are outdated. The present systems were designed for 1970 technologies, which focused on moving data packets (highlighted by geographically rigid, distinct IP address) rather than focusing on the information detailed in the packets. CCN will not overhaul existing networking pipelines, but will utilize them to restructure the manner in which networks manage resources and distribute information. Although, the system design of CCN remain sound, collecting a reliable estimate of CCN caching performance within the present Internet scenario can be regarded as challenging owing to its large scale, and to the absence of agreement within some critical elements of the evaluation setup. CCN routers are caching named contents rather than IP address, which renders the impact of Denial-o-Service (DoS) attack differ from that in TCP/IP networking (Wang, Chen, Zhou, and Qin 94). CCN is structured to run alongside or separate of TCP/IP, and do not interrupt existing networks. The architecture avails a suite of solutions and capabilities by effectively addressing issues centering on naming, memory, and security. Conclusion Internet usage has considerably evolved within the last few decades and is mainly centered on content dissemination and retrieval. Content-centric networking hinges on content distribution rather than host-o-host connectivity. The shift from host-centric to content-centric presents a number of advantages such as reduced network load, increased energy efficiency, and low dissemination latency. Content-centric networking has emerged as an alternative network architecture in which content, rather than its location, becomes the heart of the communication model. The new paradigm thrust data storage and delivery at the network layer and better deals with internet usage centering on content dissemination and retrieval. Works Cited Karl, Holger, and Andreas Willig. Protocols and Architectures for Wireless Sensor Networks. Hoboken, NJ: Wiley, 2007. Print. Wang, Kai, Chen Jin, Zhou Huachun, and Qin Yajuan. “Content-centric Networking: Effect of Content Caching on Mitigating DoS Attack.” IJCSI International Journal of Computer Science Issues, 9.6 (2012): 43-52. Read More