Why do we need both local and wide-area networks? What distinguishes a Web-based network form a Telecom-based network? Why are they both needed by the enterprise? What factors are involved in choosing one networking solution over another?

Why do we need both local and wide-area networks? What distinguishes a Web-based network form a Telecom-based network? Why are they both needed by the enterprise? What factors are involved in choosing one networking solution over another? What is your experience with Web and Telecom-enabled networks? There is also a question document.