tailieunhanh - Introduction to WANsAccessing the WAN – Chapter 1

Describe how the Cisco enterprise architecture provides integrated services over an enterprise network. – Describe key WAN technology concepts. – Select the appropriate WAN technology to meet different enterprise business requirements. | 11 I a 111 CISCO Introduction to WANs Accessing the WAN - Chapter 1 ITE I Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public 1 Cisco Thai Nguyen Networking Academy Objectives In this chapter you will learn to - Describe how the Cisco enterprise architecture provides integrated services over an enterprise network. - Describe key WAN technology concepts. - Select the appropriate WAN technology to meet different enterprise business requirements. ITE 1 Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public 2 Cisco Thai Nguyen Networking Academy What is a WAN A WAN is a data communications network that operates beyond the geographic scope of a LAN. -WANs connect devices that are separated by a broader geographical area than a LAN. -WANs use the carriers such as phone companies cable companies and network providers. -WANs use serial connections of various types to provide access over large geographic areas. There are other business needs that require communication among remote sites using WAN -People in the branch offices of an organization need to be able to communicate with the central site. -Organizations often want to share information with other organizations across large distances. -Employees _ who travel frequently need to access information that resides on their corporate networks. In addition home computer users need to send and receive data across larger distances. -It is now common in many consumers to communicate with banks stores and a variety of providers of goods and services via computers. ITE 1 Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public