Difference from SDN
SD-WAN is also said to be a new form of virtualized network, which is an abbreviation for "Software Defined WA". Translated literally, it means "a WAN controlled by software," and it is a technology that builds another network on a network composed of hardware and controls it with software.
SDN is a technology for managing virtual networks on physical networks and increasing operational flexibility.
Since SDN controls the network on a software basis, settings can be changed without complicated programming work, and it is spreading mainly in corporate LANs.
SD-WAN can apply this advantage to the WAN area.
It is said that the network can be operated more flexibly and at lower cost while taking advantage of the conventional communication network.