Networks are growing in size and complexity and this trend has created a rapid increase for networking engineers to provide practical and efficient solutions. Networking needs vary from one network to another; there is no such thing as "one size fits all." Also, a properly designed network must allow for expansion. The management of a small company may feel that this advanced technology is of no use to them since their monetary budget is limited. However, with proper planning, small companies can start with an affordable and versatile network and later expand on the next level of affordability. It is the scope of this text to provide a thorough treatment on networking and address the concerns cited above. On the title of this book "design" implies the purchasing and proper installation of the essential hardware and software that one must collect to assemble an effective computer network. Basically, it means the building of a network. By "management" we mean the duties and responsibilities of the network administrator. This book is primarily intended for those student and working professionals who have the desire to become network administrators. However, all practicing engineers will find it to be a very valuable source of information on this fascinating subject.