Transcription of The 2015 Guide to WAN Architecture & Design - Cisco
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The 2015 Guide to WAN Architecture & Design - Cisco
Produced by: The 2015 Guide to WAN Architecture & Design By Dr. Jim Metzler, Ashton Metzler & Associates Distinguished Research Fellow and Co-Founder Webtorials Analyst Division Sponsored in part by: Table of Contents Executive Summary _____ 1 Introduction and Background _____ 2 Definition of WAN _____ 2 WAN Evolution _____ 2 WAN Services _____ 2 Traditional WAN Design _____ 3 Hypothetical Company: NeedToChange _____ 4 Cisco s Response _____ 7 Key WAN Architecture and Design Considerations _____ 12 Call to Action_____ 16 2015 Guide to WAN Architecture and Design June 2015 Page 1 Executive Summary The wide area network (WAN) is a critically important topic for number of reasons. Those reasons include: The latency, jitter and packet loss that is associated with the WAN often cause the performance of applications to degrade; The WAN can be a major source of security vulnerabilities; Unlike most of the components of IT, the price/performance of WAN services doesn t obey Moore s Law; The outage of a WAN link often causes one or more sites to be offline; The lead time to either install a new WAN link or to increase the capacity of an existing WAN link can be quite lengthy
7. Remote W orkers Roughly half of NeedToChange’s employees regularly works either from home or from some remote site. 8. Guest Workers NeedToChange’s network organization is considering offering guest WiFi access from at least some of its facilities. 9. Branch Offices
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