Wide area network (WAN) infrastructure that connects enterprise branch offices has not changed for many years. Developments such as WAN optimization have provided incremental and measurable improvements in performance and cost containment. As a result, WAN infrastructure planning was easy, as changes were predictable, and increases in capacity were met by provisioning additional carrier MPLS (multiprotocol label switching) network capacity. Due to the increased adoption of software-as-a-service (SaaS), the nature of application usage and related data center use are changing at a rapid pace, and traditional methods for meeting those networking needs are neither cost-effective nor responsive enough to meet business needs. Modern users ought to demand a better solution.

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