To acquire a full-fledged functional SD-WAN overlay, you need to follow some 7 imperative steps, as:

1. Calculate the number of remote sites:
The number of SD-WAN deployment models is directly proportionally to the number of remote locations. Hence, you need to step forward after having an idea of the maximum number of remote sites.

For the smaller SD-WAN deployment, the star topology will bring the best out of it. It brings all the traffic back to the centralized spot.
However, for large deployments, it is essential to figure out the maximum number of remote sites. The more the number of sites, the more sophisticated an SD-WAN deployment should be.

What is the difference between WAN and SD-WAN?
WAN and SD-WAN are different approaches of the networking & security landscape. It’s actually a buzz that traditional WANs have some sort of issues, like the distributed configurations, the failover provisions, devices policies, slow deployment, and limitations in data centers.

SD-WAN overcome these issues by having a single simplified/ unified configuration, fast failover, the centralized management/ control, the fast deployment, and no restrictions on the underlying hardware.