These three architectures are built on an infrastructure of scalable and resilient hardware and software. Components of the architecture come together to build network systems that span an organization from network access to the cloud, and provide organizations with the services they need.
Building off the basic network infrastructure, organizations can use these network architectures to grow their network over time, adding features and functionality in an integrated solution.
One of the first steps in growing the network is expanding from the campus infrastructure to a network that connects remote sites through the Internet and through the WAN.
Click Play in the figure to view the evolution of a network to a WAN infrastructure.