With the emergence of new technologies like Voice over IP and Wireless LANs, the decentralization of enterprises, and the increased mobility of employees in the work force, separate data and voice networks are no longer adequate for today's organizations. The needs of companies, both large and small, require a newly structured, consolidated corporate network. Focusing on infrastructure, this unique resource provides you with practical guidance on reorganizing enterprise networks for maximum efficiency in today's marketplace. You find detailed information on key technologies and services such as VPNs, VoIP, ATM, MPLS, and mobile data services. The book discusses the role of the CIO and the IT department within the organization and offers a thorough understanding of the costs and security issues related to enterprise network development. Helping you strike an optimum balance with your make or buyù decisions, you learn how to determine which main network components to develop in-house and which components to outsource. Moreover, you find advice on finding the right partners for outsourcing based on your organization's specific needs.