LATEST INTELLIGENCE have hosted applications in corporate data centers . They connected geographically distributed sites over MPLS networks or private WANs , over which they had deep visibility and tight control . Most business-critical application traffic was confined to the enterprise network , where external traffic was typically backhauled and securely handed off to the Internet .
Today , businesses deploy applications and services in public and private clouds ( as well as in corporate data centers ). And most application traffic is no longer confined to the enterprise . Instead , high volumes of business-critical traffic often flow over best-effort public Internet connections over which the enterprise has minimal visibility and control .
Legacy hub-and-spoke networks , designed to support conventional enterprise applications and traffic flows , can ’ t accommodate the dynamic workloads and diverse data flows that dominate the modern enterprise . The cloud-centric model of IT introduces a variety of performance , security , and availability requirements for today ’ s enterprise network architects . p
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