Another free chapter download is available on the IT Bookworm Blog.
Written by: David Barnes and Basir Sakandar
Book: Cisco LAN Switching Fundamentals
Overview: "Cisco LAN Switching Fundamentals provides an easy-to-understand introduction to LAN switching best practices using Cisco Catalyst switches. This book provides you with a wealth of details on the architecture, operation, and configuration of the Cisco Catalyst family of switches. You learn about a wide range of topics, including quality of service (QoS), multicast, Rapid Spanning Tree Protocol (RSTP), Multiple Spanning Tree (MST), private virtual LANs (VLANs), and configuration using the native and hybrid software interfaces."
Download the free chapter, here:Chapter 9: Implementing Multicast on Catalyst Switches