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.
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
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