As mentioned above, secondary applications can be assigned to lower-priced broadband lines; critical applications, or those that must have SLA guarantees, are deployed on MPLS. SD-WAN is deployed at the edge of the network and can be integrated with security devices to closely monitor all communications and applications, and enhance communication transparency and security.

Fortinet, a UTM fire protection plant, integrates a number of different wide-area technologies into the device and certainly does not abandon the SD-WAN market. Fortinet's SD-WAN functionality is also well integrated. One of the advantages of SD-WAN is that it accelerates the UDP protocol that was previously difficult to handle in wide-area optimization.

WAN communication with voice VoIP, video conferencing, and broadcast services must be processed and arrived in real time, otherwise the user experience will be poor. The above communication is mainly based on the UDP protocol, and wide-area optimization is often helpless, but SD-WAN can cope.

SD-WAN vendors use different routes to transmit the same packet (Packet duplication) to the destination and reassemble to improve the video and sound transmission. If the enterprise uses WAN as the "United Communication", SD-WAN can improve packet loss, delay, jitter (Loss, latency, jitter), and transmit voice and video communication better.

Last year, NSS Labs tested various SD-WAN reports, with Talari Networks, Fortinet, and VeloCloud (VMware) performing best. Fortinet achieved good results in both video and VoIP. Last year, Fortinet was sent to NSS Labs for testing with the FortiGate 61E. Interestingly, Cisco Viptela did not participate in the above report test.

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