Which types of probes are utilized for SD-WAN functionality?

For SD-WAN functionality, the use of ICMP and TCP probes is essential because they play a crucial role in assessing network performance and establishing reliable connectivity between different sites.

ICMP (Internet Control Message Protocol) probes serve primarily for measuring packet loss, latency, and the overall health of the network path. This allows the SD-WAN solution to quickly determine if a link is active and performing adequately. By using ICMP, the system can send echo requests and receive echo replies, enabling it to gauge connectivity and troubleshoot potential issues effectively.

TCP (Transmission Control Protocol) probes, on the other hand, are important for measuring the quality of service from the perspective of application performance. TCP is a connection-oriented protocol that includes mechanisms for ensuring reliable transmission of data. By utilizing TCP probes, the SD-WAN can monitor higher-level application performance indicators such as throughput and response times, which are vital for applications that depend on reliable data delivery.

This combination of ICMP and TCP allows an SD-WAN solution to dynamically respond to changes in network conditions, optimize routing paths, and ensure the best possible user experience across the network. The other options do not combine the capabilities necessary for comprehensive SD-WAN functionality in the same effective manner as ICMP and TCP.