This IBM® Redbooks® publication discusses the connectivity options available for use within and beyond the data center for the following IBM System z® servers: -- System z10™ Enterprise Class (z10 EC) -- System z10 Business Class (z10 BC) -- System z9® Enterprise Class (z9 EC) -- System z9 Business Class (z9 BC)It highlights the hardware and software components, functions, typical uses, coexistence, and relative merits of these connectivity features.This book will assist readers in understanding the connectivity alternatives that are available in the planning and design of their data center infrastructure.The changes to this edition are based on the System z hardware announcement dated October 20, 2009.This connectivity handbook is intended for data center planners, IT professionals, system engineers, technical sales staff, and network planners who are involved in the planning of connectivity solutions for System z servers.