Introductions to WANs Accessing the WAN – Chapter 1 Objectives Describe how the Cisco enterprise architecture provides integrated services over an work. Describe key WAN technology concepts. Select the appropriate WAN technology to meet different enterprise business requirements. Content Index Providing Integrated Service to the Enterprise WAN Technology Concepts WAN Connection Options Chapter Labs Chapter Summary Providing Integrated Service to the Enterprise Introducing Wide works (WANs) A WAN is a work that operates beyond the geographic scope of a LAN. LANs are owned by pany anization ; WANs use facilities provided by a service provider. WANs anizations and individuals to meet their wide-munication needs. Major characteristics of WANs: WANs generally connect devices that are separated by a broader geographical area. WANs use the services of carriers. WANs use serial connections of various types to provide access to bandwidth over large geographic areas. Introducing Wide works (WANs) People in the regional or branch offices of anization need to be able municate and share data with the central site. Organizations often want to share information with anizations across large distances. Employees need to access information that resides on their works. puter users need to send and receive data across increasingly larger distances. The Evolving Enterprise The work Model The work model is a useful high-level tool for designing a work infrastructure. It provides a modular view of work, making it easier to design and build a work. The work Model The work Model Access layer -Grants user access work devices. Distribution layer - aggregates WAN connections at the edge of the campus and provides policy-based connectivity. Core layer - A high-speed backbone that is designed to switch packets as fast as possible. Availability Scalability Fast Convergence
