Download Content Networking: Architecture, Protocols, and Practice by Markus Hofmann PDF

By Markus Hofmann

Because the net has grown, so have the demanding situations linked to supplying static, streaming, and dynamic content material to end-users. This ebook is exclusive in that it addresses the subject of content material networking solely and comprehensively, tracing the evolution from conventional internet caching to modern day open and enormously extra versatile structure. With this evolutionary procedure, the authors emphasize the field's so much power strategies, ideas, and mechanisms--the center details to help you comprehend why and the way content material supply works this present day, and practice that wisdom sooner or later. + specializes in the rules that might offer you a deep and well timed knowing of content material networking. + deals dozens of protocol-specific examples exhibiting how real-life content material Networks are at the moment designed and applied. + presents vast attention of content material companies, together with either the web content material model Protocol (ICAP) and Open Pluggable side prone (OPES). + Examines tools for helping time-constrained media akin to streaming audio and video and real-time media comparable to fast messages. + Combines the imaginative and prescient and rigor of a sought after researcher with the sensible adventure of a pro improvement engineer to supply a special mix of theoretical intensity and useful software.

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0. The request line is terminated by a carriage return/line feed and followed by optional header lines. 3 HTTP request message. 2 Hypertext Transport Protocol—HTTP 35 header line begins with a header field name, which is separated by a colon from one or more attributes. , the type of Web browser), as well as, the preferred language of the client. , an additional CR/LF) and followed by an optional message body. In our example, the message body is empty, which is not necessarily the case for all HTTP request messages.

High-speed, always-on Internet access encourages an increase in online time by the average user and makes new resource-intensive applications possible. In addition, it stimulates the development of commercial products for resource intensive playback of streamed video and audio, which makes the slowdown even worse. As a result, consumers often experience low service quality due to high delay, unstable throughput, and loss of packets in the best-effort model of the Internet. 2 Evolutionary Steps in Overcoming the Web Slowdown Adding more bandwidth, more processing power and other mechanisms to improve quality-of-service (QoS) to the Internet infrastructure is one potential remedy for performance problems.

This approach, however, is not very flexible and improvements have to be made in relatively big steps. It is not possible to start small and slowly add enhancements as the traffic increases. At some point, it might even be necessary to completely replace a server system. A more scalable solution is the establishment of server farms. A server farm is comprised of multiple Web servers, each of them sharing the burden of answering requests for the same Web site. The servers are typically installed in the same location and connected to the same subnet.

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