What does the MX Security Appliance send to determine whether VPN traffic exceeds the configured latency threshold in the VoIP custom performance class?

Refer to the exhibit.

What does the MX Security Appliance send to determine whether VPN traffic exceeds the configured latency threshold in the VoIP custom performance class?
A . 1000-byte TCP probes every second, through VPN tunnels that are established over the primary WAN link.
B . 100-byte UDP probes every second, through VPN tunnels that are established over every WAN link.
C . 100-byte UDP probes every second, through VPN tunnels that are established over the primary WAN link.
D . 1000-byte TCP probes every second, through VPN tunnels that are established over every WAN link.

View Answer

Answer: B

Explanation:

The performance probe is a small payload (approximately 100 bytes) of UDP data sent over all established VPN tunnels every 1 second. MX appliances track the rate of successful responses and the time that elapses before receiving a response. This data allows the MX to determine the packet loss, latency, and jitter over each VPN tunnel in order to make the necessary performance-based decisions.

https://documentation.meraki.com/Architectures_and_Best_Practices/Cisco_Meraki_Best_Practice_Design/Best_Practice_Design_-_MX_Security_and_SD-WAN/Meraki_SD-WAN#Performance_Probes