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Free Chapters and Articles

Virtualizing Cisco Network Devices
There are two types of device virtualization when it comes to Nexus devices. The first is how to partition one physical switch and make it appear as multiple switches, each with its own administrative domain and security policy. That approach has its own benefits and business requirements.

OSPF Implementation
This chapter examines the Open Shortest Path First (OSPF) Protocol, one of the most commonly used interior gateway protocols in IP networking. OSPFv2 is an open-standard protocol that provides routing for IPv4. OSPFv3 offers some enhancements for IP Version 6 (IPv6).

Building Blocks for Data Center Cloud Architectures
At the time of this writing, most large-scale data center deployments are designed with the principles of cloud computing at the forefront. This is equally true for data centers that are built by providers or by large enterprises. This chapter illustrates the design and technology requirements for building a cloud.

Video: IPv6 Fundamentals: A Brief Look at ICMPv6 Neighbor Discovery
In this excerpt from IPv6 Fundamentals LiveLessons: A Straightforward Approach to Understanding IPv6, Rick Graziani discusses ICMPv6 Neighbor Discovery.

The Art of Network Architecture: Applying Modularity
Focuses on using specific design patterns to implement modularity. Specifically, why you should use hierarchical design to create a modular network design, why to use overlay networks to create virtualization, as well as the results of virtualization as a mechanism to provide modularity.

CCNA Wireless 640-722 Cert Guide: Planning Coverage with Wireless APs
Explains how wireless coverage can be adjusted and grown to scale over a greater area and a greater number of clients. Specifically addresses the concept of access point cell size as well as adding access points to an extended service set.