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<< Beautifully written, this book takes the reader on a compelling tour of the state of affairs in today’s Internet and the challenges it faces for supporting pervasive services of tomorrow. The approach adopted by the authors looks at the big picture, discussing the evolution of the Internet from a rigidly defined layered architecture to an interactive multi-faceted system providing, beyond connectivity, a more generative next-generation network infrastructure. In this context, the authors describe a selection of some of the prominent network mechanisms that may help in shaping the architecture of the future Internet. Overall, this book is informative, enjoyable, and an excellent reference source for every student, network professional, or researcher interested in the post-Internet era. >>...
What is the secret of a fast-responding network? The ideal network will anticipate the communication needs of all nodes, building the necessary paths proactively. Unfortunately, this level of intelligence is not possible today. A brute-force approach, whereby the network continuously maintains all possible paths among all nodes, is also not a viable proposition because networks are far too vast and...
If you aren’t a network guru and have no interest whatsoever in becoming one, though still wonder how the ‘Net’ works, this chapter will provide you with a number of precious answers. Together, we’ll revisit the hectic journey of a data packet from the time it’s conceived by an Internet server, until its destiny is accomplished in your computer. As with messengers, packets carry valuable information...
How can we increase the capillarity of the Net without facing the daunting issues that come with large-scale infrastructures? Can we embed all necessary protocols into our terminals and then use the terminals themselves to relay packets? This chapter develops the vision of ubiquitous connectivity, pinpointing foundations and problems. Networks made without any dedicated hardware are possible, but...
Web applications bring about extraordinary breakthroughs regarding our digital ecosystem. Pretty much anything with a chip and a radio interface can connect to the Web. However, many advocate a complete overhaul of the Internet as the only means to sustain innovation and productivity. Nobody knows what the next-generation of the Internet will look like; though important clues are visible as years...
Packet switching networks provide rudimentary means to move units of “raw” data around. The Net can “transport,” though it is unable to “manipulate” high-level content, video or audio sessions. Imagine what we could achieve with a network that is redesigned around what is the most precious thing in today’s digital ecosystem: the content. This chapter introduces content-aware networks, ones that can...
The Internet is far from being perfect, and thus we are bound to see many remarkable changes in the near future. In examining what the Net can and cannot do today, what are the top six reasons to upgrade it? The Net is not sufficiently ubiquitous, reactive, proactive, information-driven, distribution-efficient and searchable. This chapter introduces these widely recognized issues, paving the way for...
Virtual resources are considerably more numerous than the physical devices which host them. There are many more files than servers; more videos than people. Thus, the task of discovering relevant resources is certainly a daunting one. The search engines help to retrieve data from servers. Yet, discovering resources stored in a virtual environment requires “deep” searching techniques which must be...
The Internet “connectivity machine” is the generative engine of our modern digital society. It has been the launching pad of the Web (now the Web 2.0), truly the largest and most versatile information system ever built. While the Web phenomenon relentlessly continues, scientists worldwide are now living the dream of yet a more generative next-generation network. This chapter explores some prominent...
Publishing resources on a virtual network is a way to realize efficient data-distribution mechanisms. To this extent, each node needs to discover the other nodes, create neighborhoods and advertize its own resources. This chapter presents different techniques for making resources “discoverable,” considering two approaches dubbed as unstructured networks and structured networks. We discuss properties...
Networks strive to keep “all” of their nodes connected. However, is this really necessary? Do we actually need to “continuously” maintain routes from and to “any” possible destination? This chapter looks at networks that can discern between active and non-active paths. The idea is to care for the nodes that are actively intercommunicating, leaving the rest of the network in standby mode. In this chapter,...
In IPTV streaming, issues of entire frame losses limit the use of state-of-the-art video quality analyses techniques. We present an experimental evaluation of degradation in video quality when streaming different types of video in an IPTV scenario. The PacketStorm network emulator is used to emulate real IPTV networks as detailed in the ITU-T G.1050 recommendation. Our results show that in the face...
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