There is no doubt that information technologies are a significant part of our lives, shaping in great measure the way people work, learn, as well as play. Their rise to popularity was accelerated in the last decade by computer communications network. Networked computing devices have proven to be much more than their sum. This concept led to tremendous productivity increases and a multitude of new services that expanded its scope from research communities, to offices, to large corporations, as well as the World Wide Web.

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Radical engineering innovation rapidly improved networking technologies in lockstep with the rapid adoption of computer communications which naturally require larger, faster, and feature-rich infrastructures. On the other hand, the trend of converging virtually all communications, data, voice, and video to a single networking protocol revealed a resource constraint to the further adoption of computer-communication-based solutions. IPv4's address space cannot meet the requirements of an ever-increasing demand for universally reachable IP devices. New services make address preservation a futile pursuit, with mechanisms such as Network Address Translation getting anachronisms that block further innovation.

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With the looming exhaustion of the global IPv4 address space and also with the private address space proving insufficient for today's networks, service providers, enterprises, IP appliances manufacturers, application developers, as well as governments are now looking at the evolution of IP: IPv6. The expected address exhaustion has been the trigger and the driver for moving into a new addressing dimension. IPv6, nevertheless, is a lot more than just an extension of the address space. Significant endeavors were applied to solving protocol, deployment, and operation concerns. You should expect IPv6 to be a better protocol than IPv4. IPv6 is IPv4's future, happening now!

The most critical goal of ccie rs workbook is to show that IPv6 is a mature technology which is ready for deployment. It goes beyond discussing the basics of the protocol while staying accessible to those unfamiliar with IPv6. With ccie rs lab in hand, you will not only understand IPv6 but, most important, will be capable to plan, design, and deploy IPv6 services.

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Countless ccie rs lab workbook document and explain the vast set of protocols and features known under the name of IPv4. Even though its evolutionary nature allows IPv6 to back reference most of its protocols and features, detailing all the changes and improvements made would need more than ccie security workbook. On the other hand, IPv6 has yet to enter the mainstream and is outpacing many of the reference ccie security lab workbook on the market. This creates the risk of making any pure deployment example discussion difficult to follow. These considerations shaped the methodology employed in ccie security lab.

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The vital changes in the foundation of IP, like addressing architecture, packet format, and layer 2-to-layer 3 address resolution, are reviewed in depth. All the other protocols and features are discussed in the context of a service such as unicast, multicast, virtual private networks, quality of service, and security. The goal is to provide the reader with the understanding and tools required to deploy the respective services. This approach gives a practical dimension to the information presented. This knowledge is strengthened in the second part of the ccie collocation workbook, wherein the reader can see it applied to concrete, complete deployment case studies. Deployment planning, deployment costs, performance, as well as IPv4IPv6 coexistence topics are also covered to further anchor the discussion into real-life deployment challenges.

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All covered topics are complemented with configuration examples as well as debug outputs wherever helpful. The case studies start with a description of the existent IPv4 network environment. They go through planning and design issues and present in the end configuration of key network elements. You can maximize this knowledge immediately in a real, Cisco IOS-based network infrastructure.

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