思科认证6A.pptVIP

Chapter 6:Provision Hardware and Media for the WAN Objectives Upon completion of this chapter,  you will be able to: Recognize scalability constraints and issues for standard WAN technologies Recognize scalability constraints and performance issues for major Cisco products and WAN technologies Recognize Cisco products, product families, and WAN technologies WAN Design Considerations WAN designs should provide: Reliable services Optimization of bandwidth efficiency Minimizing bandwidth costs Selecting a WAN Technology Analog modem Telecommuters and mobile users who access the network fewer than two hours per day Backup for another type of link Selecting a WAN Technology Leased line Point-to-point networks and hub-and-spoke topologies Backup for another type of link Selecting a WAN Technology ISDN Cost-effective and fast remote access to corporate networks for telecommuters and remote offices Support for voice and video Backup for another type of link Selecting a WAN Technology Frame Relay Cost-effective, high-speed, low-latency mesh or hub-and-spoke topology between remote sites Both private and carrier-provided networks Selecting a WAN Technology X.25 Reliable WAN circuit or backbone Support for legacy applications Selecting a WAN Technology ATM Support for accelerating bandwidth requirements Support for multiple QoS classes for differing application requirements Extending into the WAN Frame Relay: Is the technology of choice for mesh and hub-and-spoke topologies Supports reasonable speed Is very cost-effective Dialup with ISDN is growing quickly to support remote access to the Internet and corporate LANs Provisioning Cisco Hardware Gather information on ports, interfaces, slots, memory, processors, and so on Cisco Product Selection Tool (included on DCN 2.0 CD in your student kit) Cisco Product Quick Reference Guide Price list: obtain a copy from your distributor or log in to Cisco’s Web site using your channel account number Provisioning IDBs on Cisc